44 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] |
| 21812 | Being is the product of pure intellect [Plotinus] |
| 21817 | The One does not exist, but is the source of all existence [Plotinus] |
| 21824 | The One is a principle which transcends Being [Plotinus] |
| 21813 | Number determines individual being [Plotinus] |
| 8088 | People still say the Hopi have no time concepts, despite Whorf's later denial [Devlin] |
| 5506 | If soul was like body, its parts would be separate, without communication [Plotinus] |
| 21827 | The movement of Soul is continuous, but we are only aware of the parts of it that are sensed [Plotinus] |
| 21828 | A person is the whole of their soul [Plotinus] |
| 21809 | Our soul has the same ideal nature as the oldest god, and is honourable above the body [Plotinus] |
| 21825 | The soul is outside of all of space, and has no connection to the bodily order [Plotinus] |
| 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] |
| 22858 | There is collective action, where a trend is manifest, but is not attributable to individuals [Lukes] |
| 21826 | The Soul reasons about the Right, so there must be some permanent Right about which it reasons [Plotinus] |
| 6922 | Ecstasy is for the neo-Platonist the highest psychological state of man [Plotinus, by Feuerbach] |
| 22854 | Power is a capacity, which may never need to be exercised [Lukes] |
| 22850 | Hidden powers are the most effective [Lukes] |
| 22852 | The pluralist view says that power is restrained by group rivalry [Lukes] |
| 22855 | One-dimensionsal power is behaviour in observable conflicts of interests [Lukes] |
| 22856 | Political organisation brings some conflicts to the fore, and suppresses others [Lukes] |
| 22857 | The two-dimensional view of power recognises the importance of controlling the agenda [Lukes] |
| 22859 | Power can be exercised to determine a person's desires [Lukes] |
| 22863 | Power is the capacity of a social class to realise its interests [Lukes] |
| 22860 | The evidence for the exertion of power need not involve a grievance of the powerless [Lukes] |
| 22861 | Power is affecting a person in a way contrary to their interests [Lukes] |
| 21133 | Supreme power is getting people to have thoughts and desires chosen by you [Lukes] |
| 22851 | In the 1950s they said ideology is finished, and expertise takes over [Lukes] |
| 22862 | Liberals take people as they are, and take their preferences to be their interests [Lukes] |
| 22853 | Anyone who thinks capitalism can improve their lives is endorsing capitalism [Lukes] |
| 21814 | How can multiple existence arise from the unified One? [Plotinus] |
| 21815 | Because the One is immobile, it must create by radiation, light the sun producing light [Plotinus] |
| 21816 | Soul is the logos of Nous, just as Nous is the logos of the One [Plotinus] |
| 21808 | Soul is author of all of life, and of the stars, and it gives them law and movement [Plotinus] |
| 21811 | Even the soul is secondary to the Intellectual-Principle [Nous], of which soul is an utterance [Plotinus] |