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19 ideas
26. Natural Theory / A. Speculations on Nature / 5. Infinite in Nature
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1748
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Archelaus was the first person to say that the universe is boundless [Archelaus, by Diog. Laertius]
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26. Natural Theory / A. Speculations on Nature / 6. Early Matter Theories / c. Ultimate substances
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614
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Heraclitus said sometimes everything becomes fire [Heraclitus, by Aristotle]
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26. Natural Theory / A. Speculations on Nature / 6. Early Matter Theories / e. The One
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424
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Reason tells us that all things are one [Heraclitus]
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26. Natural Theory / A. Speculations on Nature / 6. Early Matter Theories / f. Ancient elements
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5096
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Heraclitus says that at some time everything becomes fire [Heraclitus, by Aristotle]
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17539
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The sayings of Heraclitus are still correct, if we replace 'fire' with 'energy' [Heraclitus, by Heisenberg]
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3054
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Heraclitus said fire could be transformed to create the other lower elements [Heraclitus, by Diog. Laertius]
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26. Natural Theory / B. Natural Kinds / 1. Natural Kinds
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15886
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Science rests on the principle that nature is a hierarchy of natural kinds [Harré]
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26. Natural Theory / B. Natural Kinds / 4. Source of Kinds
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15660
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Logos is the source of everything, and my theories separate and explain each nature [Heraclitus]
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26. Natural Theory / D. Laws of Nature / 1. Laws of Nature
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15864
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Classification is just as important as laws in natural science [Harré]
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15865
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Newton's First Law cannot be demonstrated experimentally, as that needs absence of external forces [Harré]
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26. Natural Theory / D. Laws of Nature / 2. Types of Laws
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15862
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Laws can come from data, from theory, from imagination and concepts, or from procedures [Harré]
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15870
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Are laws of nature about events, or types and universals, or dispositions, or all three? [Harré]
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15871
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Are laws about what has or might happen, or do they also cover all the possibilities? [Harré]
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26. Natural Theory / D. Laws of Nature / 5. Laws from Universals
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15876
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Maybe laws of nature are just relations between properties? [Harré]
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26. Natural Theory / D. Laws of Nature / 7. Strictness of Laws
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15872
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Must laws of nature be universal, or could they be local? [Harré]
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15860
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We take it that only necessary happenings could be laws [Harré]
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15867
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Laws describe abstract idealisations, not the actual mess of nature [Harré]
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26. Natural Theory / D. Laws of Nature / 8. Scientific Essentialism / c. Essence and laws
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15892
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Laws of nature state necessary connections of things, events and properties, based on models of mechanisms [Harré]
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26. Natural Theory / D. Laws of Nature / 9. Counterfactual Claims
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15875
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In counterfactuals we keep substances constant, and imagine new situations for them [Harré]
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