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7 ideas
26. Natural Theory / A. Speculations on Nature / 1. Nature
15822
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The concept of physical necessity is basic to both causation, and to the concept of nature [Chisholm]
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26. Natural Theory / A. Speculations on Nature / 2. Natural Purpose / c. Purpose denied
12044
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Only Epicurus denied purpose in nature, for the whole world, or for its parts [Epicurus, by Annas]
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26. Natural Theory / A. Speculations on Nature / 6. Early Matter Theories / g. Atomism
20907
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Democritus says atoms have size and shape, and Epicurus added weight [Epicurus, by Ps-Plutarch]
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21669
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Atoms don't swerve by being struck, because they move in parallel, so the swerve is uncaused [Cicero on Epicurus]
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21680
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What causes atomic swerves? Do they draw lots? What decides the size or number of swerves? [Cicero on Epicurus]
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26. Natural Theory / C. Causation / 2. Types of cause
15823
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Some propose a distinct 'agent causation', as well as 'event causation' [Chisholm]
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26. Natural Theory / D. Laws of Nature / 7. Strictness of Laws
15820
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A 'law of nature' is just something which is physically necessary [Chisholm]
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