22 ideas
22396 | We take courage, temperance, wisdom and justice as moral, but Aristotle takes wisdom as intellectual [Foot] |
22397 | Wisdom is open to all, and not just to the clever or well trained [Foot] |
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] |
8087 | Golden ages: 1900-1960 for pure logic, and 1950-1985 for applied logic [Devlin] |
8089 | Montague's intensional logic incorporated the notion of meaning [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] |
4871 | A thing is free if it acts only by the necessity of its own nature [Spinoza] |
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] |
22402 | Most people think virtues can be displayed in bad actions [Foot] |
23145 | Virtues are intended to correct design flaws in human beings [Foot, by Driver] |
22401 | Actions can be in accordance with virtue, but without actually being virtuous [Foot] |
22398 | Virtues are corrective, to resist temptation or strengthen motivation [Foot] |
22403 | Temperance is not a virtue if it results from timidity or excessive puritanism [Foot] |
22400 | Courage overcomes the fears which should be overcome, and doesn't overvalue personal safety [Foot] |