forked from GitHub/gf-core
14 lines
452 B
Plaintext
14 lines
452 B
Plaintext
[ A -> B |- ~ B -> ~ A ]
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------------------------------ Implication strategy
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[ A -> B , ~ B |- ~ A ]
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------------------------------ Negation rewrite
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[ A -> B , ~ B |- A -> _|_ ]
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------------------------------ Implication strategy
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[ A , A -> B , ~ B |- _|_ ]
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------------------------------ Modus ponens
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[ A , A -> B , B , ~ B |- _|_ ]
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------------------------------ Forgetting
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[ B , ~ B |- _|_ ]
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------------------------------ Ex falso quodlibet _|_
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Ø
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