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In metaphysics, identity (from Latin: identitas, "sameness") is the relation each thing bears only to itself. [1] [2] The notion of identity gives rise to many philosophical problems, including the identity of indiscernibles (if x and y share all their properties, are they one and the same thing?), and questions about change and personal identity over time (what has to be the case for a person ...
Personal identity is the unique numerical identity of a person over time. [1] [2] Discussions regarding personal identity typically aim to determine the necessary and sufficient conditions under which a person at one time and a person at another time can be said to be the same person, persisting through time.
A Dialogue on Personal Identity and Immortality is a book by the philosopher John Perry. [ 1 ] [ 2 ] [ 3 ] It is intended as an undergraduate textbook [ 4 ] and has been translated into Spanish, Chinese, Persian and Korean.
…in this alone consists personal Identity, i.e. the sameness of rational Being: And as far as this consciousness can be extended backwards to any past Action or Thought, so far reaches the Identity of that Person; it is the same self now it was then; and 'tis by the same self with this present one that now reflects on it, that that Action was ...
Objectivism, the philosophy founded by novelist Ayn Rand, is grounded in three axioms, one of which is the law of identity, "A is A." In the Objectivism of Ayn Rand, the law of identity is used with the concept existence to deduce that that which exists is something. [6] In Objectivist epistemology logic is based on the law of identity. [7]
Identity (philosophy), the relation each thing bears only to itself; Law of identity, that each thing is identical with itself; Personal identity, the numerical identity of a person over time; Identity (social science), qualities etc that characterize a person or group; Political identity
Sources of the Self: The Making of the Modern Identity [1] is a work of philosophy by Charles Taylor, published in 1989 by Harvard University Press. It is an attempt to articulate and to write a history of the "modern identity".
Gottfried Leibniz's Principle of the identity of indiscernibles states that two things are identical if and only if they share the same and only the same properties. This is a principle which defines identity rather than difference, although it established the tradition in logic and analytical philosophy of conceiving of identity and difference as oppositional.