more from David M. Armstrong

### Single Idea 18393

#### [catalogued under 4. Formal Logic / F. Set Theory ST / 3. Types of Set / b. Empty (Null) Set]

Full Idea

The null class is useful in formal set theory, but I hope that does not require that there be a thing called the null class which is truthmaker for the strange proposition

Gist of Idea

For 'there is a class with no members' we don't need the null set as truthmaker

Source

David M. Armstrong (Truth and Truthmakers [2004], 09.1)

Book Reference

Armstrong,D.M.: 'Truth and Truthmakers' [CUP 2004], p.114

A Reaction

It is not quite clear why it doesn't, but then it is not quite clear to philosophers what the status of the null set is, in comparison with sets that have members.