13 ideas
| 19044 | Saying truths fit experience adds nothing to truth; nothing makes sentences true [Davidson] |
| 13201 | ∈ says the whole set is in the other; ⊆ says the members of the subset are in the other [Enderton] |
| 13204 | The 'ordered pair' <x,y> is defined to be {{x}, {x,y}} [Enderton] |
| 13206 | A 'linear or total ordering' must be transitive and satisfy trichotomy [Enderton] |
| 13200 | Note that {Φ} =/= Φ, because Φ ∈ {Φ} but Φ ∉ Φ [Enderton] |
| 13199 | The empty set may look pointless, but many sets can be constructed from it [Enderton] |
| 13203 | The singleton is defined using the pairing axiom (as {x,x}) [Enderton] |
| 13202 | Fraenkel added Replacement, to give a theory of ordinal numbers [Enderton] |
| 13205 | We can only define functions if Choice tells us which items are involved [Enderton] |
| 6400 | Without the dualism of scheme and content, not much is left of empiricism [Davidson] |
| 6398 | Different points of view make sense, but they must be plotted on a common background [Davidson] |
| 6399 | Criteria of translation give us the identity of conceptual schemes [Davidson] |
| 468 | Musical performance can reveal a range of virtues [Damon of Ath.] |