more from James Robert Brown

Single Idea 9642

[catalogued under 4. Formal Logic / F. Set Theory ST / 7. Natural Sets]

Full Idea

Neither a flock of birds nor a pack of wolves is strictly a set, since a flock can fly south, and a pack can be on the prowl, whereas sets go nowhere and menace no one.

Gist of Idea

A flock of birds is not a set, because a set cannot go anywhere


James Robert Brown (Philosophy of Mathematics [1999], Ch. 7)

Book Reference

Brown,James Robert: 'Philosophy of Mathematics' [Routledge 2002], p.97

A Reaction

To say that the pack menaced you would presumably be to commit the fallacy of composition. Doesn't the number 64 have properties which its set-theoretic elements (whatever we decide they are) will lack?