出典:Wiktionary
intuitionistic logic (複数形 intuitionistic logics)
出典:Wikipedia
出典:『Wikipedia』 (2011/06/01 21:59 UTC 版)
Intuitionistic logic, or constructive logic, is a symbolic logic system that differs from classical logic in its definition of what it means for a statement to be true. In classical logic, all well-formed statements are assumed to be either true or false, even if we do not have a proof of either. In constructive logic, a statement is only true if there is a constructive proof that it is true, and only false if there is a constructive proof that it is false. Operations in constructive logic preserve justification, rather than truth.