21 ideas
8092 | Logic was merely a branch of rhetoric until the scientific 17th century [Devlin] |
23449 | Interpreting a text is representing it as making sense [Morris,M] |
8081 | 'No councillors are bankers' and 'All bankers are athletes' implies 'Some athletes are not councillors' [Devlin] |
8085 | Modern propositional inference replaces Aristotle's 19 syllogisms with modus ponens [Devlin] |
8086 | Predicate logic retains the axioms of propositional logic [Devlin] |
8091 | Situation theory is logic that takes account of context [Devlin] |
8089 | Montague's intensional logic incorporated the notion of meaning [Devlin] |
8087 | Golden ages: 1900-1960 for pure logic, and 1950-1985 for applied logic [Devlin] |
8082 | Where a conditional is purely formal, an implication implies a link between premise and conclusion [Devlin] |
23484 | Bipolarity adds to Bivalence the capacity for both truth values [Morris,M] |
8072 | Sentences of apparent identical form can have different contextual meanings [Devlin] |
23494 | Conjunctive and disjunctive quantifiers are too specific, and are confined to the finite [Morris,M] |
8075 | Space and time are atomic in the arrow, and divisible in the tortoise [Devlin] |
23460 | To count, we must distinguish things, and have a series with successors in it [Morris,M] |
23451 | Counting needs to distinguish things, and also needs the concept of a successor in a series [Morris,M] |
23452 | Discriminating things for counting implies concepts of identity and distinctness [Morris,M] |
3061 | Anaxarchus said that he was not even sure that he knew nothing [Anaxarchus, by Diog. Laertius] |
8088 | People still say the Hopi have no time concepts, despite Whorf's later denial [Devlin] |
8073 | How do we parse 'time flies like an arrow' and 'fruit flies like an apple'? [Devlin] |
23491 | There must exist a general form of propositions, which are predictabe. It is: such and such is the case [Morris,M] |
8076 | The distinction between sentences and abstract propositions is crucial in logic [Devlin] |