18 ideas
13913 | The four 'perfect syllogisms' are called Barbara, Celarent, Darii and Ferio [Engelbretsen/Sayward] |
13914 | Syllogistic logic has one rule: what is affirmed/denied of wholes is affirmed/denied of their parts [Engelbretsen/Sayward] |
13915 | Syllogistic can't handle sentences with singular terms, or relational terms, or compound sentences [Engelbretsen/Sayward] |
13916 | Term logic uses expression letters and brackets, and '-' for negative terms, and '+' for compound terms [Engelbretsen/Sayward] |
13850 | In modern logic all formal validity can be characterised syntactically [Engelbretsen/Sayward] |
13849 | Classical logic rests on truth and models, where constructivist logic rests on defence and refutation [Engelbretsen/Sayward] |
13851 | Unlike most other signs, = cannot be eliminated [Engelbretsen/Sayward] |
7306 | If the only property of a name was its reference, we couldn't explain bearerless names [Miller,A] |
13852 | Axioms are ω-incomplete if the instances are all derivable, but the universal quantification isn't [Engelbretsen/Sayward] |
7322 | Constitutive scepticism is about facts, and epistemological scepticism about our ability to know them [Miller,A] |
7325 | Dispositions say what we will do, not what we ought to do, so can't explain normativity [Miller,A] |
7324 | Explain meaning by propositional attitudes, or vice versa, or together? [Miller,A] |
7323 | If truth is deflationary, sentence truth-conditions just need good declarative syntax [Miller,A] |
7315 | 'Jones is a married bachelor' does not have the logical form of a contradiction [Miller,A] |
7328 | The principle of charity is holistic, saying we must hold most of someone's system of beliefs to be true [Miller,A] |
7329 | Maybe we should interpret speakers as intelligible, rather than speaking truth [Miller,A] |
7333 | The Frege-Geach problem is that I can discuss the wrongness of murder without disapproval [Miller,A] |
1558 | Clearly the gods ignore human affairs, or they would have given us justice [Thrasymachus] |