4 ideas
18151 | Could we replace sets by the open sentences that define them? [Chihara, by Bostock] |
9103 | A universal is not a real feature of objects, but only a thought-object in the mind [William of Ockham] |
9104 | A universal is the result of abstraction, which is only a kind of mental picturing [William of Ockham] |
5470 | The idea of laws of nature arose in the Middle Ages [Hall,AR, by Ellis] |