Combining Texts

All the ideas for 'Queries to the 'Opticks'', 'Letters to Edward Stillingfleet' and 'Natural Science (lost)'

expand these ideas     |    start again     |     specify just one area for these texts

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4 ideas

7. Existence / A. Nature of Existence / 6. Criterion for Existence

527	Everything exists which anyone perceives [Metrodorus of Chios]

9. Objects / D. Essence of Objects / 3. Individual Essences

15990

Every individual thing which exists has an essence, which is its internal constitution [Locke]

11. Knowledge Aims / B. Certain Knowledge / 1. Certainty

15994

If it is knowledge, it is certain; if it isn't certain, it isn't knowledge [Locke]

26. Natural Theory / D. Laws of Nature / 1. Laws of Nature

16746

Principles of things are not hidden features of forms, but the laws by which they were formed [Newton]