From Wikipedia:

Philosophy of mind is a branch of philosophy that studies the nature of the mind. The mind–body problem is a paradigm issue in philosophy of mind, although other issues are addressed, such as the hard problem of consciousness, and the nature of particular mental states.[2][3][4] Aspects of the mind that are studied include mental eventsmental functionsmental propertiesconsciousness, the ontology of the mind, the nature of thought, and the relationship of the mind to the body.

Dualism and monism are the two central schools of thought on the mind–body problem, although nuanced views have arisen that do not fit one or the other category neatly. Dualism is found in both Eastern and Western traditions (in the Sankhya and Yoga schools of Hindu philosophy[5] as well as Plato)[6] but its entry into Western philosophy was thanks to René Descartes in the 17th century.[7]Substance dualists like Descartes argue that the mind is an independently existing substance, whereas property dualists maintain that the mind is a group of independent properties that emerge from and cannot be reduced to the brain, but that it is not a distinct substance.[8]

Monism is the position that mind and body are not ontologically distinct entities (independent substances). This view was first advocated in Western philosophy by Parmenides in the 5th century BCE and was later espoused by the 17th century rationalist Baruch Spinoza.[9] Physicalists argue that only entities postulated by physical theory exist, and that mental processes will eventually be explained in terms of these entities as physical theory continues to evolve. Physicalists maintain various positions on the prospects of reducing mental properties to physical properties (many of whom adopt compatible forms of property dualism),[10][11][12][13][14][15] and the ontological status of such mental properties remains unclear.[14][16][17] Idealists maintain that the mind is all that exists and that the external world is either mental itself, or an illusion created by the mind. Neutral monists such as Ernst Mach and William James argue that events in the world can be thought of as either mental (psychological) or physical depending on the network of relationships into which they enter, and dual-aspect monists such as Spinoza adhere to the position that there is some other, neutral substance, and that both matter and mind are properties of this unknown substance. The most common monisms in the 20th and 21st centuries have all been variations of physicalism; these positions include behaviorism, the type identity theoryanomalous monism and functionalism.[18]

Most modern philosophers of mind adopt either a reductive or non-reductive physicalist position, maintaining in their different ways that the mind is not something separate from the body.[18] These approaches have been particularly influential in the sciences, especially in the fields of sociobiologycomputer science (specifically, artificial intelligence), evolutionary psychology and the various neurosciences.[19][20][21][22] Reductive physicalists assert that all mental states and properties will eventually be explained by scientific accounts of physiological processes and states.[23][24][25] Non-reductive physicalists argue that although the mind is not a separate substance, mental properties supervene on physical properties, or that the predicates and vocabulary used in mental descriptions and explanations are indispensable, and cannot be reduced to the language and lower-level explanations of physical science.[26][27] Continued neuroscientific progress has helped to clarify some of these issues; however, they are far from being resolved. Modern philosophers of mind continue to ask how the subjective qualities and the intentionality of mental states and properties can be explained in naturalistic terms.[28][29]

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