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Ideas for 'fragments/reports', 'Presupposition and Conversational Implicature' and 'Laws in Nature'

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2. Reason / A. Nature of Reason / 1. On Reason

9429	Many forms of reasoning, such as extrapolation and analogy, are useful but deductively invalid [Mumford]
	Full Idea: There are many forms of reasoning - extrapolation, interpolation, and other arguments from analogy - that are useful but deductively invalid.
	From: Stephen Mumford (Laws in Nature [2004], 04.4)
	A reaction: [He cites Molnar for this]