Leibnitz's law

British  

noun

1. the principle that two expressions satisfy exactly the same predicates if and only if they both refer to the same subject

2. the weaker principle that if a=b whatever is true of a is true of b

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Example Sentences

Among the most important are Aristotle’s classification of causes into material, formal, efficient and final, set forth in his Physics and elsewhere, and known as his doctrine of the Four Causes; Geulincx’s Occasional Causes, meant as a solution of certain difficulties in the cosmology of Descartes; Leibnitz’s law of Sufficient Reason; and Kant’s explanation of cause and effect as an a priori category of the understanding, intended as an answer to Hume’s scepticism, but very much less effective than the line of explanation suggested by Locke.

From Project Gutenberg