display all the ideas for this combination of texts
2 ideas
| 12507 | A mass consists of its atoms, so the addition or removal of one changes its identity [Locke] |
| Full Idea: Whilst they exist united together, the mass consisting of the same atoms must be the same mass, ...but if one of those atoms be taken away, or one new one added, it is no longer the same mass, or the same body. | |
| From: John Locke (Essay Conc Human Understanding (2nd Ed) [1694], 2.27.03) | |
| A reaction: This is clearly a 'strict and philosophical' usage, rather than a 'loose and popular' one - indeed, so strict as to be ridiculous. Knowing what we do now of quantum activity (emission of photons etc), we would abandon 'identity' totally. |
| 12559 | Complex ideas are collections of qualities we attach to an unknown substratum [Locke] |
| Full Idea: The complex ideas that our names of the species of substances properly stand for are collections of qualities, as have been observed to co-exist in an unknown substratum which we call 'substance'. | |
| From: John Locke (Essay Conc Human Understanding (2nd Ed) [1694], 4.06.07) | |
| A reaction: Locke refers to a substratum, but this is not actually a 'bare' substratum, as he believes in real essences (see other quotations), but believes we have absolutely no chance of knowing them. |