Single Idea 18379

[catalogued under 8. Modes of Existence / B. Properties / 3. Types of Properties]

Full Idea

A set of determinates under the one determinable are incompatible by definition. If an object is not one mile in length, then its actual length will be incompatible with being one mile in length.

Gist of Idea

The determinates of a determinable must be incompatible with each other

Source

David M. Armstrong (Truth and Truthmakers [2004], 05.2.1)

Book Reference

Armstrong,D.M.: 'Truth and Truthmakers' [CUP 2004], p.62


A Reaction

This is a much better general version of the standard example 'if it is red it can't be green'. Armstrong uses it to give a more precise account of incompatibility. Useful.

Related Idea

Idea 18378 Length is a 'determinable' property, and one mile is one its 'determinates' [Armstrong]