more from Edwin D. Mares

Single Idea 18790

[catalogued under 4. Formal Logic / E. Nonclassical Logics / 2. Intuitionist Logic]

Full Idea

In intuitionist logic each connective has one introduction and one elimination rule attached to it, but in the classical system we have to add an extra rule for negation.

Gist of Idea

Intuitionism as natural deduction has no rule for negation


Edwin D. Mares (Negation [2014], 5.5)

Book Reference

'Bloomsbury Companion to Philosophical Logic', ed/tr. Horsten,L/Pettigrew,R [Bloomsbury 2014], p.202

A Reaction

How very intriguing. Mares says there are other ways to achieve classical logic, but they all seem rather cumbersome.

Related Idea

Idea 18789 Intuitionist logic looks best as natural deduction [Mares]