- Law of identity
logic, the law of identity states that an object is the same as itself: "A" ≡ "A"
reflexive relationupholds the law of identity. When discussing equality, the fact that "A is A" is a tautology.
philosophy, the law is often attributed to Aristotle, who wrote:
:"Now 'why a thing is itself' is a meaningless inquiry (for—to give meaning to the question 'why'—the fact or the existence of the thing must already be evident—e.g., that the moon is eclipsed—but the fact that a thing is itself is the single reason and the single cause to be given in answer to all such questions as why the man is man, or the musician musical, unless one were to answer, 'because each thing is inseparable from itself, and its being one just meant this.' This, however, is common to all things and is a short and easy way with the question.)":: —
Wilhelm Wundtcredits Gottfried Leibnizwith the symbolic formulation, "A is A." [ [http://perso.orange.fr/thomiste/eternelb.htm La philosophie éternelle ou traditionnelle, la métaphysique, la logique, la raison et l'intelligence ] ]
Jonathon Keatsheld a petition drive to pass 'A = A' as statutory law in Berkeley, California. Specifically, the proposed law stated that, "every entity shall be identical to itself". Any entity caught being unidentical to itself was to be subject to a fine of up to one tenth of a cent. The law did not pass. [ [http://www.sfgate.com/cgi-bin/article.cgi?file=/chronicle/archive/2002/08/13/BA200448.DTL San Francisco Chronicle] ]
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law of identity — one of three principles in logic: 1. : a statement (as “a house is a house”) in which the subject and predicate are the same is true 2. : the copula in an identity affirms an existent of which the identity is true 3. : a statement of an identity… … Useful english dictionary
law of identity — Logic. the law that any proposition implies itself. * * * … Universalium
identity — iden·ti·ty n pl ties 1: sameness of essential character or aspect collateral estoppel requires identity of the issues and the parties 2 a: separate or distinct existence when movables lose their identity or become an integral part of the… … Law dictionary
identity theft — see theft Merriam Webster’s Dictionary of Law. Merriam Webster. 1996 … Law dictionary
identity classification — index identification Burton s Legal Thesaurus. William C. Burton. 2006 … Law dictionary
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identity verification — index identification Burton s Legal Thesaurus. William C. Burton. 2006 … Law dictionary
Identity — may refer to:Philosophy* Identity (philosophy), the sameness of two things * Identity theory of mind, in the philosophy of mind, holds that the mind is identical to the brain * Personal identity (philosophy) * Identity (social science) * Identity … Wikipedia
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Identity (philosophy) — In philosophy, identity, from Latin: identitas (“sameness”), is the relation each thing bears just to itself.  According to Leibniz s law two things sharing every attribute are not only similar, but are the same thing. The concept of sameness… … Wikipedia