Single Idea 15457

[catalogued under 2. Reason / D. Definition / 1. Definitions]

Full Idea

All circles of interdefinition are useless by themselves. But if we reach one of the interdefined pair, then we have them both.

Gist of Idea

Interdefinition is useless by itself, but if we grasp one separately, we have them both


David Lewis (Defining 'Intrinsic' (with Rae Langton) [1998], IV)

Book Reference

Lewis,David: 'Papers in Metaphysics and Epistemology' [CUP 1999], p.121