13 ideas
10185 | Set theory is the standard background for modern mathematics [Burgess] |
10184 | Structuralists take the name 'R' of the reals to be a variable ranging over structures, not a structure [Burgess] |
10189 | There is no one relation for the real number 2, as relations differ in different models [Burgess] |
10186 | If set theory is used to define 'structure', we can't define set theory structurally [Burgess] |
10187 | Abstract algebra concerns relations between models, not common features of all the models [Burgess] |
10188 | How can mathematical relations be either internal, or external, or intrinsic? [Burgess] |
19284 | Asserting a necessity just expresses our inability to imagine it is false [Blackburn] |
22384 | A 'double effect' is a foreseen but not desired side-effect, which may be forgivable [Foot] |
22385 | The doctrine of double effect can excuse an outcome because it wasn't directly intended [Foot] |
22386 | Double effect says foreseeing you will kill someone is not the same as intending it [Foot] |
22387 | Without double effect, bad men can make us do evil by threatening something worse [Foot] |
22388 | Double effect seems to rely on a distinction between what we do and what we allow [Foot] |
22383 | Abortion is puzzling because we do and don't want the unborn child to have rights [Foot] |