principle of identity
logic
Also known as: law of identity
Quick Summary
The principle of identity, also known as the law of identity, is a fundamental concept in logic. It states that any statement where the subject and predicate are the same is true, such as "a house is a house." This principle asserts that a thing is identical to itself. It is one of three basic principles of logic, alongside the law of non-contradiction and the law of excluded middle. The law of identity is crucial for establishing the basis of logical reasoning and understanding abstract relations.1
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