9 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] |
19494 | Fictionalism allows that simulated beliefs may be tracking real facts [Yablo] |
9216 | Each area of enquiry, and its source, has its own distinctive type of necessity [Fine,K] |
19493 | Governing possible worlds theory is the fiction that if something is possible, it happens in a world [Yablo] |
9214 | Unsupported testimony may still be believable [Fine,K] |
9215 | Causation is easier to disrupt than logic, so metaphysics is part of nature, not vice versa [Fine,K] |