14 ideas
20349 | Metaphysics aims at the essence of things, and a system to show how this explains other truths [Richardson] |
20351 | Metaphysics needs systems, because analysis just obsesses over details [Richardson] |
20350 | Metaphysics generalises the data, to get at the ontology [Richardson] |
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] |
7903 | The six perfections are giving, morality, patience, vigour, meditation, and wisdom [Nagarjuna] |
20356 | Humans dominate because, unlike other animals, they have a synthesis of conflicting drives [Richardson] |
20366 | A mind that could see cause and effect as a continuum would deny cause and effect [Richardson] |