Single Idea 13243

[catalogued under 4. Formal Logic / E. Nonclassical Logics / 5. Relevant Logic]

Full Idea

Relevant logic endorses excluded middle, ..but says instances of the law may fail. Bv¬B is true in every situation that settles the matter of B. It is necessary that there is some such situation.

Gist of Idea

Excluded middle must be true for some situation, not for all situations

Source

JC Beall / G Restall (Logical Pluralism [2006], 5.2)

Book Reference

Beall,J/Restall,G: 'Logical Pluralism' [OUP 2006], p.53


A Reaction

See next idea for the unusual view of necessity on which this rests. It seems easier to assert something about all situations than just about 'some' situation.

Related Idea

Idea 13244 Relevant necessity is always true for some situation (not all situations) [Beall/Restall]