more from Peter Simons

Single Idea 12848

[catalogued under 4. Formal Logic / G. Formal Mereology / 4. Groups]

Full Idea

Groups may coincide in membership without being identical - extensionality goes.

Gist of Idea

The same members may form two groups


Peter Simons (Parts [1987], 4.9)

Book Reference

Simons,Peter: 'Parts: a Study in Ontology' [OUP 1987], p.168

A Reaction

Thus an eleven-person orchestra may also constitute a football team. What if a pile of stones is an impediment to you, and useful to me? Is it then two groups? Suppose they hum while playing football? (Don't you just love philosophy?)