display all the ideas for this combination of texts
3 ideas
| 21583 | When sense-data change, there must be indistinguishable sense-data in the process [Russell] |
| Full Idea: In all cases of sense-data capable of gradual change, we may find one sense-datum indistinguishable from another, and that indistinguishable from a third, while yet the first and third are quite easily distinguishable. | |
| From: Bertrand Russell (Our Knowledge of the External World [1914], 5) | |
| A reaction: This point is key to the sense-data theory, because it gives them independent existence, standing between reality and subjective experience. It is also the reason why they look increasingly implausible, if they may not be experienced. |
| 21577 | Empirical truths are particular, so general truths need an a priori input of generality [Russell] |
| Full Idea: All empirical evidence is of particular truths. Hence, if there is any knowledge of general truths at all, there must be some knowledge of general truths which is independent of empirical evidence. | |
| From: Bertrand Russell (Our Knowledge of the External World [1914], 2) | |
| A reaction: Humean empiricists respond by being a sceptical of general truths. At this stage of his career Russell looks like a thoroughgoing rationalist, and he believes in the reality of universals, relations and propositions. He became more empirical later. |
| 24115 | There is no proof that we forget things - only that we can't recall [Nietzsche] |
| Full Idea: That forgetting exists has never yet been demonstrated, but only that many things do not occur to us when we want them to. | |
| From: Friedrich Nietzsche (Unpublished Notebooks 1881-82 [1882], 12[1]123) | |
| A reaction: There is now quite a lot of evidence that there innumerable memories buried in that mind that we seem unable to directly recall. He is right that we can hardly demonstrate this negative fact. |