Single Idea 16533

[catalogued under 10. Modality / A. Necessity / 3. Types of Necessity]

Full Idea

If logically necessary truths are consequences of the laws of logic, then I think they are only a proper sub-class of the class of metaphysically necessary truths.


A 'proper' sub-class must be smaller than the other class

Gist of Idea

Logical necessities, based on laws of logic, are a proper sub-class of metaphysical necessities


E.J. Lowe (What is the Source of Knowledge of Modal Truths? [2013], 1)

Book Reference

-: 'Mind' [-], p.2

A Reaction

The problem for this is unusual and bizarre systems of logic, or systems that contradict one another. This idea is only plausible if you talk about the truths derived from some roughly 'classical' core of logic. 'Tonk' won't do it!