more from Baruch Brody

Single Idea 12132

[catalogued under 9. Objects / A. Existence of Objects / 5. Individuation / a. Individuation]

Full Idea

Enduring objects should be taken as fundamental in an ontology, and for all such objects indiscernibility is both a necessary and sufficient condition for identity.


'Indiscernibility' is not being able to tell them apart

Gist of Idea

Indiscernibility is a necessary and sufficient condition for identity


Baruch Brody (Identity and Essence [1980], 3)

Book Reference

Brody,Baruch: 'Identity and Essence' [Princeton 1980], p.43

A Reaction

Brody offers a substantial defence, but I don't find it plausible. Apart from Black's well known twin spheres example (Idea 10195), discernibility is relative to the powers of the observer. Two similar people in the mist aren't thereby identical.

Related Idea

Idea 10195 If the universe just held two indiscernibles spheres, that refutes the Identity of Indiscernibles [Black]