5 ideas
15547 | Negative existentials have 'totality facts' as truthmakers [Armstrong, by Lewis] |
9565 | Zermelo made 'set' and 'member' undefined axioms [Zermelo, by Chihara] |
3339 | For Zermelo's set theory the empty set is zero and the successor of each number is its unit set [Zermelo, by Blackburn] |
15542 | All possibilities are recombinations of properties in the actual world [Armstrong, by Lewis] |
20041 | Intentional actions are those which are explained by giving the reason for so acting [Anscombe] |