20 ideas
8092 | Logic was merely a branch of rhetoric until the scientific 17th century [Devlin] |
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] |
8072 | Sentences of apparent identical form can have different contextual meanings [Devlin] |
8075 | Space and time are atomic in the arrow, and divisible in the tortoise [Devlin] |
8088 | People still say the Hopi have no time concepts, despite Whorf's later denial [Devlin] |
14280 | The probability of two events is the first probability times the second probability assuming the first [Bayes] |
8073 | How do we parse 'time flies like an arrow' and 'fruit flies like an apple'? [Devlin] |
8076 | The distinction between sentences and abstract propositions is crucial in logic [Devlin] |
20878 | We can discuss the criteria of a judgment, or the weight given to them, or their application [LaFollette] |
20877 | Errors in moral practice might be inconsistent or inappropriate principles, or inappropriate application [LaFollette] |
20881 | The act/omission distinction is important for duties, but less so for consequences [LaFollette] |
20886 | Are we only obligated by agreement, or should we always help the weak? [LaFollette] |
20879 | Too many options may open us to unwanted pressures, like being paid very little [LaFollette] |
20880 | Should people be forced to make choices? [LaFollette] |