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'fragments/reports', 'Laws in Nature' and 'Remarks on the definition and nature of mathematics'
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2 ideas
2. Reason / A. Nature of Reason / 1. On Reason
9429
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Many forms of reasoning, such as extrapolation and analogy, are useful but deductively invalid [Mumford]
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2. Reason / B. Laws of Thought / 2. Sufficient Reason
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Chrysippus said the uncaused is non-existent [Chrysippus, by Plutarch]
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