axiom of complete induction

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• Well-founded relation — In mathematics, a binary relation, R, is well founded (or wellfounded) on a class X if and only if every non empty subset of X has a minimal element with respect to R; that is, for every non empty subset S of X, there is an element m of S such… …   Wikipedia

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• Scepticism — • Etymology of the word based on a Greek term meaning speculation, doubt Catholic Encyclopedia. Kevin Knight. 2006. Scepticism     Scepticism      …   Catholic encyclopedia