2014-07-25 15:30:30 +00:00
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import logic
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2015-04-22 02:33:21 +00:00
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section
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2014-07-25 15:30:30 +00:00
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hypothesis P : Prop.
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2014-08-26 16:12:18 +00:00
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definition crash
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2014-07-25 15:30:30 +00:00
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:= assume H : P,
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have H' : ¬ P,
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from H,
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_.
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2014-10-12 00:13:33 +00:00
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end
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