12 lines
304 B
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12 lines
304 B
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Copyright (c) 2015 Microsoft Corporation. All rights reserved.
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Released under Apache 2.0 license as described in the file LICENSE.
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Author: Leonardo de Moura
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Excluded middle
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Remark: This axiom can be derived from propext funext and hilbert.
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See examples/diaconescu
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-/
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axiom em (a : Prop) : a ∨ ¬a
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