7 ideas
9540 | A 'value-assignment' (V) is when to each variable in the set V assigns either the value 1 or the value 0 [Hughes/Cresswell] |
9541 | The Law of Transposition says (P→Q) → (¬Q→¬P) [Hughes/Cresswell] |
9543 | The rules preserve validity from the axioms, so no thesis negates any other thesis [Hughes/Cresswell] |
9544 | A system is 'weakly' complete if all wffs are derivable, and 'strongly' if theses are maximised [Hughes/Cresswell] |
22474 | Unlike aesthetic evaluation, moral evaluation needs a concept of responsibility [Foot] |
22472 | The practice of justice may well need a recognition of human equality [Foot] |
19035 | General Relativity allows substantivalism about space-time - that it has independent properties [Hoefer] |