13 lines
No EOL
244 B
Text
13 lines
No EOL
244 B
Text
(* import("tactic.lua") *)
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definition f(a : Bool) : Bool := not a.
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theorem T (a b : Bool) : a \/ b => (f b) => a := _.
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apply discharge
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apply discharge
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disj_hyp
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unfold f
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exact
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absurd
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done
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print environment 1. |