12 ideas
| 9108 | From an impossibility anything follows [William of Ockham] |
| 9107 | A proposition is true if its subject and predicate stand for the same thing [William of Ockham] |
| 16300 | Ockham had an early axiomatic account of truth [William of Ockham, by Halbach] |
| 9106 | The word 'every' only signifies when added to a term such as 'man', referring to all men [William of Ockham] |
| 9113 | Just as unity is not a property of a single thing, so numbers are not properties of many things [William of Ockham] |
| 9110 | The words 'thing' and 'to be' assert the same idea, as a noun and as a verb [William of Ockham] |
| 15388 | Universals are single things, and only universal in what they signify [William of Ockham] |
| 15990 | Every individual thing which exists has an essence, which is its internal constitution [Locke] |
| 9109 | If essence and existence were two things, one could exist without the other, which is impossible [William of Ockham] |
| 15994 | If it is knowledge, it is certain; if it isn't certain, it isn't knowledge [Locke] |
| 17319 | There are 'conceptual' explanations, with their direction depending on complexity [Schnieder] |
| 9105 | Some concepts for propositions exist only in the mind, and in no language [William of Ockham] |