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'Thinking About Mathematics', 'Essays on Active Powers 3: Princs of action' and 'Propositions'
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4. Formal Logic / D. Modal Logic ML / 1. Modal Logic
19209
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Simple Quantified Modal Logc doesn't work, because the Converse Barcan is a theorem [Merricks]
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4. Formal Logic / D. Modal Logic ML / 7. Barcan Formula
19208
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The Converse Barcan implies 'everything exists necessarily' is a consequence of 'necessarily, everything exists' [Merricks]
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