Full Idea
What is 'metaphysically' possible hinges …on the question of whether acceptable metaphysical principles and categories permit the existence of some state of affairs.
Gist of Idea
The metaphysically possible is what acceptable principles and categories will permit
Source
E.J. Lowe (The Possibility of Metaphysics [1998], 1.3)
Book Reference
Lowe,E.J.: 'The Possibility of Metaphysics' [OUP 2001], p.12
A Reaction
Lowe breezes along with confident assertions like this. I once heard Kit Fine tease him for over-confidence. All you do is work out 'acceptable' principles and categories, and you've cracked it!