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] |
7628 | Broad rejects the inferential component of the representative theory [Broad, by Maund] |
22363 | You have only begun to do real science when you can express it in numbers [Kelvin] |
20644 | Energy has progressed from a mere formula, to a principle pervading all nature [Kelvin] |