Single Idea 13866

[catalogued under 18. Thought / D. Concepts / 1. Concepts / a. Nature of concepts]

Full Idea

Before we can conclude that φ expresses a sortal concept, we need to ensure that 'is the same φ as' generates statements of genuine identity rather than of some other equivalence relation.

Clarification

Equivalence relations are transitive, symmetric and transitive

Gist of Idea

A concept is only a sortal if it gives genuine identity

Source

Crispin Wright (Frege's Concept of Numbers as Objects [1983], 1.i)

Book Reference

Wright,Crispin: 'Frege's Conception of Numbers' [Scots Philosophical Monographs 1983], p.3


Related Idea

Idea 13865 'Sortal' concepts show kinds, use indefinite articles, and require grasping identities [Wright,C]