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Ideas for 'Parmenides', 'I.39 On Solitude' and 'Philosophy of Mathematics'

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4. Formal Logic / E. Nonclassical Logics / 2. Intuitionist Logic

18122	Classical interdefinitions of logical constants and quantifiers is impossible in intuitionism [Bostock]
	Full Idea: None of the classical ways of defining one logical constant in terms of others is available in intuitionist logic (and this includes the two quantifiers).
	From: David Bostock (Philosophy of Mathematics [2009], 7.2)