14 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] |
13852 | Axioms are ω-incomplete if the instances are all derivable, but the universal quantification isn't [Engelbretsen/Sayward] |
12295 | 3-D says things are stretched in space but not in time, and entire at a time but not at a location [Fine,K] |
12298 | Genuine motion, rather than variation of position, requires the 'entire presence' of the object [Fine,K] |
12296 | 4-D says things are stretched in space and in time, and not entire at a time or at a location [Fine,K] |
18882 | You can ask when the wedding was, but not (usually) when the bride was [Fine,K, by Simons] |
12297 | Three-dimensionalist can accept temporal parts, as things enduring only for an instant [Fine,K] |
20441 | An ordinary object can be a work of art, but only if some theory of art supports it [Danto] |