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92-524: The concept of tulpas has origins in the Buddhist nirmāṇakāya , translated in Tibetan as sprul-pa ( སྤྲུལ་པ་ ): the earthly bodies that a buddha manifests in order to teach those who have not attained nirvana . The western understanding of tulpas was developed by twentieth-century European mystical explorers, who interpreted the idea independently of buddhahood. 20th-century Theosophists adapted

184-745: A system of 12 categories , divided into the four classes: quantity, quality, relation, and modality. More recent theories of categories were proposed by C. S. Peirce , Edmund Husserl , Samuel Alexander , Roderick Chisholm , and E. J. Lowe . Many philosophers rely on the contrast between concrete and abstract objects . According to a common view, concrete objects, like rocks, trees, and human beings, exist in space and time, undergo changes, and impact each other as cause and effect. They contrast with abstract objects, like numbers and sets , which do not exist in space and time, are immutable, and do not engage in causal relations. Particulars are individual entities and include both concrete objects, like Aristotle,

276-400: A fire, is always followed by another phenomenon, like a feeling of pain. According to nomic regularity theories, regularities manifest as laws of nature studied by science. Counterfactual theories focus not on regularities but on how effects depend on their causes. They state that effects owe their existence to the cause and would not occur without them. According to primitivism, causation

368-414: A gradual continuum. The word metaphysics has its origin in the ancient Greek words metá ( μετά , meaning ' after ' , ' above ' , and ' beyond' ' ) and phusiká ( φυσικά ), as a short form of ta metá ta phusiká , meaning ' what comes after the physics ' . This is often interpreted to mean that metaphysics discusses topics that, due to their generality and comprehensiveness, lie beyond

460-422: A higher degree of existence than matter, which can only imperfectly reflect Platonic forms. Another key concern in metaphysics is the division of entities into distinct groups based on underlying features they share. Theories of categories provide a system of the most fundamental kinds or the highest genera of being by establishing a comprehensive inventory of everything. One of the earliest theories of categories

552-568: A key role in ethics regarding the moral responsibility people have for what they do. Identity is a relation that every entity has to itself as a form of sameness. It refers to numerical identity when the very same entity is involved, as in the statement "the morning star is the evening star " (both are the planet Venus ). In a slightly different sense, it encompasses qualitative identity, also called exact similarity and indiscernibility , which occurs when two distinct entities are exactly alike, such as perfect identical twins. The principle of

644-475: A long history in metaphysics, meta-metaphysics has only recently developed into a systematic field of inquiry. Metaphysicians often regard existence or being as one of the most basic and general concepts. To exist means to form part of reality , distinguishing real entities from imaginary ones. According to the orthodox view, existence is a property of properties: if an entity exists then its properties are instantiated. A different position states that existence

736-439: A powerful concentration of thought." David-Néel believed that a tulpa could develop a mind of its own: "Once the tulpa is endowed with enough vitality to be capable of playing the part of a real being, it tends to free itself from its maker's control. According to David-Néel, this happens nearly mechanically, just as the child, when her body is completed and able to live apart, leaves its mother's womb." She said she had created such

828-479: A priori methods have been the dominant approach. They rely on rational intuition and abstract reasoning from general principles rather than sensory experience . A posteriori approaches, by contrast, ground metaphysical theories in empirical observations and scientific theories. Some metaphysicians incorporate perspectives from fields such as physics , psychology , linguistics , and history into their inquiry. The two approaches are not mutually exclusive: it

920-475: A priori reasoning and view metaphysics as a practice continuous with the empirical sciences that generalizes their insights while making their underlying assumptions explicit. This approach is known as naturalized metaphysics and is closely associated with the work of Willard Van Orman Quine . He relies on the idea that true sentences from the sciences and other fields have ontological commitments , that is, they imply that certain entities exist. For example, if

1012-465: A single cloud is an overlay of countless clouds, one for each cloud-like collection of water droplets. Mereological moderatists hold that certain conditions must be met for a group of entities to compose a whole, for example, that the entities touch one another. Mereological nihilists reject the idea of wholes altogether, claiming that there are no clouds or tables but only particles that are arranged cloud-wise or table-wise. A related mereological problem

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1104-402: A statement is possibly true if it is true in at least one possible world, whereas it is necessarily true if it is true in all possible worlds. Modal realists argue that possible worlds exist as concrete entities in the same sense as the actual world, with the main difference being that the actual world is the world we live in while other possible worlds are inhabited by counterparts . This view

1196-464: A substratum, also called bare particular , together with various properties. The substratum confers individuality to the particular while the properties express its qualitative features or what it is like. This approach is rejected by bundle theorists , who state that particulars are only bundles of properties without an underlying substratum. Some bundle theorists include in the bundle an individual essence, called haecceity , to ensure that each bundle

1288-461: A term from German philosopher Gottfried Wilhelm Leibniz 's theodicy , many metaphysicians use the concept of possible worlds to analyze the meaning and ontological ramifications of modal statements. A possible world is a complete and consistent way the totality of things could have been. For example, the dinosaurs were wiped out in the actual world but there are possible worlds in which they are still alive. According to possible world semantics,

1380-401: A truthmaker for the statement "a tomato is red". Based on this observation, it is possible to pursue metaphysical research by asking what the truthmakers of statements are, with different areas of metaphysics being dedicated to different types of statements. According to this view, modal metaphysics asks what makes statements about what is possible and necessary true while the metaphysics of time

1472-443: A tulpa in the image of a jolly Friar Tuck -like monk , which she claimed had later developed independent thought and had to be destroyed. David-Néel raised the possibility that her experience was illusory: "I may have created my own hallucination", though she said others could see the thoughtforms that she created. Influenced by depictions in television and cinema from the 1990s and 2000s, the term tulpa started to be used to refer to

1564-423: A tulpa is a "real or somewhat-real person". The number of active participants in these online communities is in the low hundreds, and few meetings in person have taken place. They belong to "primarily urban, middle-class, Euro-American adolescent and young adult demographics" and they "cite loneliness and social anxiety as an incentive to pick up the practice". 93.7% of respondents expressed that their involvement with

1656-703: A type of willed imaginary friend . Practitioners consider tulpas to be sentient and relatively autonomous. Online communities dedicated to tulpas spawned on the 4chan and Reddit websites. These communities refer to tulpa practitioners as "tulpamancers". The communities gained popularity when adult fans of My Little Pony started discussing tulpas of characters from the My Little Pony television series. The fans attempted to use meditation and lucid dreaming techniques to create imaginary friends . Surveys by Veissière explored this community's demographic, social, and psychological profiles. These practitioners believe

1748-621: A unified dimension rather than as independent dimensions. Empirically focused metaphysicians often rely on scientific theories to ground their theories about the nature of reality in empirical observations. Similar issues arise in the social sciences where metaphysicians investigate their basic concepts and analyze their metaphysical implications. This includes questions like whether social facts emerge from non-social facts, whether social groups and institutions have mind-independent existence, and how they persist through time. Metaphysical assumptions and topics in psychology and psychiatry include

1840-399: Is a basic concept that cannot be analyzed in terms of non-causal concepts, such as regularities or dependence relations. One form of primitivism identifies causal powers inherent in entities as the underlying mechanism. Eliminativists reject the above theories by holding that there is no causation. Mind encompasses phenomena like thinking , perceiving , feeling , and desiring as well as

1932-435: Is a fundamental aspect of reality, meaning that besides facts about what is the case, there are additional facts about what could or must be the case. A different view argues that modal truths are not about an independent aspect of reality but can be reduced to non-modal characteristics, for example, to facts about what properties or linguistic descriptions are compatible with each other or to fictional statements . Borrowing

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2024-521: Is a property of individuals, meaning that it is similar to other properties, such as shape or size. It is controversial whether all entities have this property. According to Alexius Meinong , there are nonexistent objects , including merely possible objects like Santa Claus and Pegasus . A related question is whether existence is the same for all entities or whether there are different modes or degrees of existence. For instance, Plato held that Platonic forms , which are perfect and immutable ideas, have

2116-442: Is a well-known principle that gives preference to simple theories, in particular, those that assume that few entities exist. Other principles consider explanatory power , theoretical usefulness, and proximity to established beliefs. Despite its status as one of the main branches of philosophy, metaphysics has received numerous criticisms questioning its legitimacy as a field of inquiry. One criticism argues that metaphysical inquiry

2208-629: Is also used in Evans-Wentz 's 1927 translation of the Tibetan Book of the Dead . The concept is also used in the Western practice of magic . The Slender Man has been described by some people as a tulpa-effect, and attributed to multiple people's thought processes. Occultist William Walker Atkinson in his book The Human Aura described thoughtforms as simple ethereal objects emanating from

2300-440: Is controversial and various alternatives have been suggested, for example, that possible worlds only exist as abstract objects or are similar to stories told in works of fiction . Space and time are dimensions that entities occupy. Spacetime realists state that space and time are fundamental aspects of reality and exist independently of the human mind. Spacetime idealists, by contrast, hold that space and time are constructs of

2392-401: Is determined. Hard determinists infer from this that there is no free will, whereas libertarians conclude that determinism must be false. Compatibilists offer a third perspective, arguing that determinism and free will do not exclude each other, for instance, because a person can still act in tune with their motivation and choices even if they are determined by other forces. Free will plays

2484-400: Is divided into subdisciplines based on the perspective they take. Metaphysical cosmology examines changeable things and investigates how they are connected to form a world as a totality extending through space and time. Rational psychology focuses on metaphysical foundations and problems concerning the mind, such as its relation to matter and the freedom of the will. Natural theology studies

2576-436: Is fundamentally neither material nor mental and suggest that matter and mind are both derivative phenomena. A key aspect of the mind–body problem is the hard problem of consciousness or how to explain that physical systems like brains can produce phenomenal consciousness. The status of free will as the ability of a person to choose their actions is a central aspect of the mind–body problem. Metaphysicians are interested in

2668-420: Is impossible because humans lack the cognitive capacities needed to access the ultimate nature of reality. This line of thought leads to skepticism about the possibility of metaphysical knowledge. Empiricists often follow this idea, like Hume, who argued that there is no good source of metaphysical knowledge since metaphysics lies outside the field of empirical knowledge and relies on dubious intuitions about

2760-434: Is interested in the truthmakers of temporal statements about the past, present, and future. A closely related topic concerns the nature of truth. Theories of truth aim to determine this nature and include correspondence , coherence , pragmatic , semantic , and deflationary theories . Metaphysicians employ a variety of methods to develop metaphysical theories and formulate arguments for and against them. Traditionally,

2852-468: Is made up of only one kind. According to idealism , everything is mental, including physical objects, which may be understood as ideas or perceptions of conscious minds. Materialists, by contrast, state that all reality is at its core material. Some deny that mind exists but the more common approach is to explain mind in terms of certain aspects of matter, such as brain states, behavioral dispositions , or functional roles. Neutral monists argue that reality

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2944-479: Is more fundamental than other forms of philosophical inquiry. Metaphysics encompasses a wide range of general and abstract topics. It investigates the nature of existence , the features all entities have in common, and their division into categories of being . An influential division is between particulars and universals . Particulars are individual unique entities, like a specific apple. Universals are general features that different particulars have in common, like

3036-419: Is no consensus about the validity of these criticisms and whether they affect metaphysics as a whole or only certain issues or approaches in it. For example, it could be the case that certain metaphysical disputes are merely verbal while others are substantive. Metaphysics is related to many fields of inquiry by investigating their basic concepts and relation to the fundamental structure of reality. For example,

3128-411: Is one of the oldest branches of philosophy . The precise nature of metaphysics is disputed and its characterization has changed in the course of history. Some approaches see metaphysics as a unified field and give a wide-sweeping definition by understanding it as the study of "fundamental questions about the nature of reality" or as an inquiry into the essences of things. Another approach doubts that

3220-408: Is opposed by so-called serious metaphysicians , who contend that metaphysical disputes are about substantial features of the underlying structure of reality. A closely related debate between ontological realists and anti-realists concerns the question of whether there are any objective facts that determine which metaphysical theories are true. A different criticism, formulated by pragmatists , sees

3312-457: Is possible to combine elements from both. The method a metaphysician chooses often depends on their understanding of the nature of metaphysics, for example, whether they see it as an inquiry into the mind-independent structure of reality, as metaphysical realists claim, or the principles underlying thought and experience, as some metaphysical anti-realists contend. A priori approaches often rely on intuitions—non-inferential impressions about

3404-448: Is rejected by probabilistic theories , which claim that the cause merely increases the probability that the effect occurs. This view can explain that smoking causes cancer even though this does not happen in every single case. The regularity theory of causation , inspired by David Hume 's philosophy, states that causation is nothing but a constant conjunction in which the mind apprehends that one phenomenon, like putting one's hand in

3496-418: Is studied by mereology . The problem of the many is a philosophical question about the conditions under which several individual things compose a larger whole. For example, a cloud is made up of many droplets without a clear boundary, raising the question of which droplets form part of the cloud. According to mereological universalists, every collection of entities forms a whole. This means that what seems to be

3588-406: Is the cause and the spill is the effect. Besides the single-case causation between particulars in this example, there is also general-case causation expressed in statements such as "smoking causes cancer". The term agent causation is used when people and their actions cause something. Causation is usually interpreted deterministically, meaning that a cause always brings about its effect. This view

3680-417: Is the most basic inquiry upon which all other branches of philosophy depend in some way. Metaphysics is traditionally understood as a study of mind-independent features of reality. Starting with Immanuel Kant 's critical philosophy , an alternative conception gained prominence that focuses on conceptual schemes rather than external reality. Kant distinguishes transcendent metaphysics, which aims to describe

3772-558: Is the third aspect of the trikāya and the physical manifestation of a Buddha in time and space. In Vajrayāna it is described as "the dimension of ceaseless manifestation." One early Buddhist text , the Pali Samaññaphala Sutta , lists the ability to create a “mind-made body” ( manomāyakāya ) as one of the "fruits of the contemplative life". Commentarial texts such as the Patisambhidamagga and

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3864-401: Is unique. Another proposal for concrete particulars is that they are individuated by their space-time location. Concrete particulars encountered in everyday life, like rocks, tables, and organisms, are complex entities composed of various parts. For example, a table is made up of a tabletop and legs, each of which is itself made up of countless particles. The relation between parts and wholes

3956-465: Is whether there are simple entities that have no parts, as atomists claim, or whether everything can be endlessly subdivided into smaller parts, as continuum theorists contend. Universals are general entities, encompassing both properties and relations , that express what particulars are like and how they resemble one another. They are repeatable, meaning that they are not limited to a unique existent but can be instantiated by different particulars at

4048-593: The Abhidharmakośakārikā . Asanga 's Bodhisattvabhūmi defines nirmāṇa as a magical illusion and "basically, something without a material basis." The Madhyamaka school of philosophy sees all reality as empty of essence; all reality is seen as a form of nirmita or magical illusion. In Tibetan Buddhism , nirmanakayas are emanations of the Sambhoghakaya of the Buddhas, which effortlessly arise due to

4140-578: The Visuddhimagga state that this mind-made body is how Gautama Buddha and arhats are able to travel into heavenly realms using the continuum of the mindstream ( cittasaṃtāna ) and it is also used to explain the multiplication miracle of the Buddha as illustrated in the Divyavadana , in which the Buddha multiplied his nirmita or emanated human form into countless other bodies which filled

4232-532: The Nyingma scholar yogi Jigme Lingpa, the main classifications include: Metaphysics Metaphysics is the branch of philosophy that examines the basic structure of reality . It is traditionally seen as the study of mind-independent features of the world, but some theorists view it as an inquiry into the fundamental categories of human understanding. Some philosophers, including Aristotle , designate metaphysics as first philosophy to suggest that it

4324-510: The Upanishads in ancient India , Daoism in ancient China , and pre-Socratic philosophy in ancient Greece . During the subsequent medieval period in the West, discussions about the nature of universals were influenced by the philosophies of Plato and Aristotle. The modern period saw the emergence of various comprehensive systems of metaphysics, many of which embraced idealism . In

4416-518: The Vajrayana concept of the emanation body into the concepts of 'tulpa' and 'thoughtform'. The Theosophist Annie Besant , in the 1905 book Thought-Forms , divides them into three classes: forms in the shape of the person who creates them, forms that resemble objects or people and may become ensouled by nature spirits or by the dead, and forms that represent inherent qualities from the astral or mental planes, such as emotions. The term 'thoughtform'

4508-638: The auras surrounding people, generating from their thoughts and feelings. He further elaborated in Clairvoyance and Occult Powers how experienced practitioners of the occult can produce thoughtforms from their auras that serve as astral projections which may or may not look like the person who is projecting them, or as illusions that can only be seen by those with "awakened astral senses". Spiritualist Alexandra David-Néel stated that she had observed Buddhist tulpa creation practices in 20th-century Tibet. She described tulpas as "magic formations generated by

4600-404: The 20th century, traditional metaphysics in general and idealism in particular faced various criticisms, which prompted new approaches to metaphysical inquiry. Metaphysics is the study of the most general features of reality , including existence , objects and their properties , possibility and necessity, space and time , change, causation , and the relation between matter and mind . It

4692-627: The Eiffel Tower, or a specific apple, and abstract objects, like the number 2 or a specific set in mathematics. Also called individuals , they are unique, non-repeatable entities and contrast with universals , like the color red, which can at the same time exist in several places and characterize several particulars. A widely held view is that particulars instantiate universals but are not themselves instantiated by something else, meaning that they exist in themselves while universals exist in something else. Substratum theory analyzes each particular as

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4784-523: The English language through the Latin word metaphysica . The nature of metaphysics can also be characterized in relation to its main branches. An influential division from early modern philosophy distinguishes between general and special or specific metaphysics. General metaphysics, also called ontology , takes the widest perspective and studies the most fundamental aspects of being. It investigates

4876-402: The abstract nature of its topic, metaphysics has received criticisms questioning the reliability of its methods and the meaningfulness of its theories. Metaphysics is relevant to many fields of inquiry that often implicitly rely on metaphysical concepts and assumptions. The roots of metaphysics lie in antiquity with speculations about the nature and origin of the universe, like those found in

4968-430: The average person thinks about an issue. For example, common-sense philosophers have argued that mereological nihilism is false since it implies that commonly accepted things, like tables, do not exist. Conceptual analysis , a method particularly prominent in analytic philosophy , aims to decompose metaphysical concepts into component parts to clarify their meaning and identify essential relations. In phenomenology ,

5060-625: The color red . Modal metaphysics examines what it means for something to be possible or necessary. Metaphysicians also explore the concepts of space, time, and change , and their connection to causality and the laws of nature . Other topics include how mind and matter are related , whether everything in the world is predetermined , and whether there is free will . Metaphysicians use various methods to conduct their inquiry. Traditionally, they rely on rational intuitions and abstract reasoning but have more recently also included empirical approaches associated with scientific theories. Due to

5152-437: The compassionate energy ( thugs rje ) of the Buddhas. According to Jigme Lingpa , nirmanakaya (emanations) appear "according to the different perceptions, dispositions, and aspirations" of sentient beings. He also states that "their enlightened activities, which remove the delusions of samsara, are as limitless as the boundless reaches of space." In Tibetan Buddhism, there are various types of tulkus or nirmanakaya. According to

5244-404: The concepts of truth , truth-bearer , and truthmaker to conduct their inquiry. Truth is a property of being in accord with reality. Truth-bearers are entities that can be true or false, such as linguistic statements and mental representations. A truthmaker of a statement is the entity whose existence makes the statement true. For example, the fact that a tomato exists and that it is red acts as

5336-768: The correctness of specific claims or general principles. For example, arguments for the A-theory of time , which states that time flows from the past through the present and into the future, often rely on pre-theoretical intuitions associated with the sense of the passage of time. Some approaches use intuitions to establish a small set of self-evident fundamental principles, known as axioms , and employ deductive reasoning to build complex metaphysical systems by drawing conclusions from these axioms. Intuition-based approaches can be combined with thought experiments , which help evoke and clarify intuitions by linking them to imagined situations. They use counterfactual thinking to assess

5428-755: The creation of tulpas has "made their condition better", and led to new unusual sensory experiences. Some practitioners have sexual and romantic interactions with their tulpas, though the practice is controversial and trending toward taboo . One survey found that 8.5% support a metaphysical explanation of tulpas, 76.5% support a neurological or psychological explanation, and 14% "other" explanations. Practitioners believe tulpas are able to communicate with their host in ways they sense do not originate from their own thoughts. Some practitioners report experiencing hallucinations of their tulpas. Practitioners that have hallucinations report being able to see, hear and touch their tulpas. Veissière's survey of 141 respondents found that

5520-452: The different areas of metaphysics share a set of underlying features and provides instead a fine-grained characterization by listing all the main topics investigated by metaphysicians. Some definitions are descriptive by providing an account of what metaphysicians do while others are normative and prescribe what metaphysicians ought to do. Two historically influential definitions in ancient and medieval philosophy understand metaphysics as

5612-496: The divine and its role as the first cause. The scope of special metaphysics overlaps with other philosophical disciplines, making it unclear whether a topic belongs to it or to areas like philosophy of mind and theology . Applied metaphysics is a relatively young subdiscipline. It belongs to applied philosophy and studies the applications of metaphysics, both within philosophy and other fields of inquiry. In areas like ethics and philosophy of religion , it addresses topics like

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5704-744: The fault of metaphysics not in its cognitive ambitions or the meaninglessness of its statements, but in its practical irrelevance and lack of usefulness. Martin Heidegger criticized traditional metaphysics, saying that it fails to distinguish between individual entities and being as their ontological ground. His attempt to reveal the underlying assumptions and limitations in the history of metaphysics to "overcome metaphysics" influenced Jacques Derrida 's method of deconstruction . Derrida employed this approach to criticize metaphysical texts for relying on opposing terms, like presence and absence, which he thought were inherently unstable and contradictory. There

5796-447: The features that all entities share and how entities can be divided into different categories . Categories are the most general kinds, such as substance, property, relation , and fact . Ontologists research which categories there are, how they depend on one another, and how they form a system of categories that provides a comprehensive classification of all entities. Special metaphysics considers being from more narrow perspectives and

5888-468: The fundamental structure of mind-independent reality. The concepts of possibility and necessity convey what can or must be the case, expressed in modal statements like "it is possible to find a cure for cancer" and "it is necessary that two plus two equals four". Modal metaphysics studies metaphysical problems surrounding possibility and necessity, for instance, why some modal statements are true while others are false. Some metaphysicians hold that modality

5980-404: The human mind, created to organize and make sense of reality. Spacetime absolutism or substantivalism understands spacetime as a distinct object, with some metaphysicians conceptualizing it as a container that holds all other entities within it. Spacetime relationism sees spacetime not as an object but as a network of relations between objects, such as the spatial relation of being next to and

6072-443: The indiscernibility of identicals is widely accepted and holds that numerically identical entities exactly resemble one another. The converse principle, known as identity of indiscernibles or Leibniz's Law, is more controversial and states that two entities are numerically identical if they exactly resemble one another. Another distinction is between synchronic and diachronic identity. Synchronic identity relates an entity to itself at

6164-415: The individual sciences by studying the most general and abstract aspects of reality. The individual sciences, by contrast, examine more specific and concrete features and restrict themselves to certain classes of entities, such as the focus on physical things in physics , living entities in biology , and cultures in anthropology . It is disputed to what extent this contrast is a strict dichotomy rather than

6256-469: The meaning of a statement is given by the procedure used to verify it, usually through the observations that would confirm it. Based on this controversial assumption, they argue that metaphysical statements are meaningless since they make no testable predictions about experience. A slightly weaker position allows metaphysical statements to have meaning while holding that metaphysical disagreements are merely verbal disputes about different ways to describe

6348-501: The method of eidetic variation is used to investigate essential structures underlying phenomena . This method involves imagining an object and varying its features to determine which ones are essential and cannot be changed. The transcendental method is a further approach and examines the metaphysical structure of reality by observing what entities there are and studying the conditions of possibility without which these entities could not exist. Some approaches give less importance to

6440-734: The mind used to order experience by classifying entities. Natural and social kinds are often understood as special types of universals. Entities belonging to the same natural kind share certain fundamental features characteristic of the structure of the natural world. In this regard, natural kinds are not an artificially constructed classification but are discovered, usually by the natural sciences, and include kinds like electrons , H 2 O , and tigers. Scientific realists and anti-realists disagree about whether natural kinds exist. Social kinds, like money and baseball , are studied by social metaphysics and characterized as useful social constructions that, while not purely fictional, do not reflect

6532-889: The natural sciences rely on concepts such as law of nature , causation, necessity, and spacetime to formulate their theories and predict or explain the outcomes of experiments. While scientists primarily focus on applying these concepts to specific situations, metaphysics examines their general nature and how they depend on each other. For instance, physicists formulate laws of nature, like laws of gravitation and thermodynamics , to describe how physical systems behave under various conditions. Metaphysicians, by contrast, examine what all laws of nature have in common, asking whether they merely describe contingent regularities or express necessary relations. New scientific discoveries have also influenced existing metaphysical theories and inspired new ones. Einstein's theory of relativity , for instance, prompted various metaphysicians to conceive space and time as

6624-401: The object is present, not the object as a whole. Change means that an earlier part is qualitatively different from a later part. For example, when a banana ripens, there is an unripe part followed by a ripe part. Causality is the relation between cause and effect whereby one entity produces or affects another entity. For instance, if a person bumps a glass and spills its contents then the bump

6716-471: The objective features of reality beyond sense experience, from critical metaphysics, which outlines the aspects and principles underlying all human thought and experience. Philosopher P. F. Strawson further explored the role of conceptual schemes, contrasting descriptive metaphysics, which articulates conceptual schemes commonly used to understand the world, with revisionary metaphysics, which aims to produce better conceptual schemes. Metaphysics differs from

6808-584: The ontological foundations of moral claims and religious doctrines. Beyond philosophy, its applications include the use of ontologies in artificial intelligence , economics , and sociology to classify entities. In psychiatry and medicine , it examines the metaphysical status of diseases . Meta-metaphysics is the metatheory of metaphysics and investigates the nature and methods of metaphysics. It examines how metaphysics differs from other philosophical and scientific disciplines and assesses its relevance to them. Even though discussions of these topics have

6900-465: The past. From the perspective of the B-series theory, time is static, and events are ordered by the temporal relations earlier-than and later-than without any essential difference between past, present, and future. Eternalism holds that past, present, and future are equally real, whereas presentism asserts that only entities in the present exist. Material objects persist through time and change in

6992-480: The possible consequences of these situations. For example, to explore the relation between matter and consciousness, some theorists compare humans to philosophical zombies —hypothetical creatures identical to humans but without conscious experience . A related method relies on commonly accepted beliefs instead of intuitions to formulate arguments and theories. The common-sense approach is often used to criticize metaphysical theories that deviate significantly from how

7084-508: The process, like a tree that grows or loses leaves. The main ways of conceptualizing persistence through time are endurantism and perdurantism . According to endurantism, material objects are three-dimensional entities that are wholly present at each moment. As they change, they gain or lose properties but otherwise remain the same. Perdurantists see material objects as four-dimensional entities that extend through time and are made up of different temporal parts . At each moment, only one part of

7176-629: The rates of neurodivergence including autism , ADD , and ADHD was significantly higher among the surveyed tulpamancers than in the general population. He goes on to speculate that people may be more likely to want to make a tulpa because these groups have a higher level of loneliness. Tulpamancers were typically white, articulate, and imaginative and lived in urban areas. A 2022 study found individuals that did not have psychosis who experienced more than one unusual sensory phenomenon, (in this instance ASMR and Tulpamancy) were found to have greater hallucination-proneness than people that only experienced one of

7268-464: The realm beyond sensory experience. A related argument favoring the unreliability of metaphysical theorizing points to the deep and lasting disagreements about metaphysical issues, suggesting a lack of overall progress. Another criticism holds that the problem lies not with human cognitive abilities but with metaphysical statements themselves, which some claim are neither true nor false but meaningless . According to logical positivists , for instance,

7360-448: The realm of physics and its focus on empirical observation. Metaphysics may have received its name by a historical accident when Aristotle's book on this subject was published. Aristotle did not use the term metaphysics but his editor (likely Andronicus of Rhodes ) may have coined it for its title to indicate that this book should be studied after Aristotle's book published on physics : literally ' after physics ' . The term entered

7452-433: The relation between free will and causal determinism —the view that everything in the universe, including human behavior, is determined by preceding events and laws of nature. It is controversial whether causal determinism is true, and, if so, whether this would imply that there is no free will. According to incompatibilism , free will cannot exist in a deterministic world since there is no true choice or control if everything

7544-431: The same time, whereas diachronic identity is about the same entity at different times, as in statements like "the table I bought last year is the same as the table in my dining room now". Personal identity is a related topic in metaphysics that uses the term identity in a slightly different sense and concerns questions like what personhood is or what makes someone a person. Various contemporary metaphysicians rely on

7636-559: The same time. For example, the particulars Nelson Mandela and Mahatma Gandhi instantiate the universal humanity , similar to how a strawberry and a ruby instantiate the universal red . A topic discussed since ancient philosophy, the problem of universals consists in the challenge of characterizing the ontological status of universals. Realists argue that universals are real, mind-independent entities that exist in addition to particulars. According to Platonic realists , universals exist independently of particulars, which implies that

7728-418: The science of the first causes and as the study of being qua being, that is, the topic of what all beings have in common and to what fundamental categories they belong. In the modern period, the scope of metaphysics expanded to include topics such as the distinction between mind and body and free will . Some philosophers follow Aristotle in describing metaphysics as "first philosophy", suggesting that it

7820-517: The sentence "some electrons are bonded to protons" is true then it can be used to justify that electrons and protons exist. Quine used this insight to argue that one can learn about metaphysics by closely analyzing scientific claims to understand what kind of metaphysical picture of the world they presuppose. In addition to methods of conducting metaphysical inquiry, there are various methodological principles used to decide between competing theories by comparing their theoretical virtues. Ockham's Razor

7912-458: The sky. A Buddha or other realized being is able to project many such nirmitas simultaneously in an infinite variety of forms in different realms simultaneously. The Indian Buddhist philosopher Vasubandhu ( fl. 4th to 5th century CE) defined nirmita as a siddhi or psychic power (Pali iddhi , Sanskrit: ṛddhi ) developed through Buddhist discipline, concentrated discipline ( samadhi ) and wisdom in his seminal work on Buddhist philosophy,

8004-517: The temporal relation of coming before . In the metaphysics of time, an important contrast is between the A-series and the B-series . According to the A-series theory, the flow of time is real, meaning that events are categorized into the past, present, and future. The present continually moves forward in time and events that are in the present now will eventually change their status and lie in

8096-618: The two sensory phenomenon. Somer et al. (2021) described the Internet tulpamancer subculture as being used to "overcome loneliness and mental suffering", and noted the close association with reality shifting (RS), a way of deliberately inducing a form of self-hypnosis in order to escape from current reality into a pre-planned desired reality or "wonderland" of chosen fantasy characters. Nirm%C4%81%E1%B9%87ak%C4%81ya Nirmāṇakāya ( Chinese : 應身 ; pinyin : yīngshēn ; Tibetan : སྤྲུལ་སྐུ་ , tulku , Wylie : sprul sku )

8188-408: The underlying faculties responsible for these phenomena. The mind–body problem is the challenge of clarifying the relation between physical and mental phenomena. According to Cartesian dualism , minds and bodies are distinct substances. They causally interact with each other in various ways but can, at least in principle, exist on their own. This view is rejected by monists , who argue that reality

8280-475: The universal red would continue to exist even if there were no red things. A more moderate form of realism , inspired by Aristotle, states that universals depend on particulars, meaning that they are only real if they are instantiated. Nominalists reject the idea that universals exist in either form. For them, the world is composed exclusively of particulars. Conceptualists offer an intermediate position, stating that universals exist, but only as concepts in

8372-419: The world. According to this view, the disagreement in the metaphysics of composition about whether there are tables or only particles arranged table-wise is a trivial debate about linguistic preferences without any substantive consequences for the nature of reality. The position that metaphysical disputes have no meaning or no significant point is called metaphysical or ontological deflationism . This view

8464-452: Was proposed by Aristotle, who outlined a system of 10 categories . He argued that substances (e.g. man and horse), are the most important category since all other categories like quantity (e.g. four), quality (e.g. white), and place (e.g. in Athens) are said of substances and depend on them. Kant understood categories as fundamental principles underlying human understanding and developed

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