10 lines
No EOL
197 B
Text
10 lines
No EOL
197 B
Text
Variables a b c : Bool
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Axiom H : a \/ b
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Theorem T (a b : Bool) : a \/ b => b \/ a.
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apply Discharge.
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apply (DisjCases H).
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apply Disj2.
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assumption.
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apply Disj1.
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assumption.
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done. |