16 lines
No EOL
382 B
Text
16 lines
No EOL
382 B
Text
# Set: pp::colors
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Set: pp::unicode
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Proof state:
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a : Bool, b : Bool, H : b ⊢ a ∨ b
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## Proof state:
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a : Bool, b : Bool, H : b ⊢ a
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## Proof state:
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a : Bool, b : Bool, H : b ⊢ b
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## Error (line: 9, pos: 0) failed to backtrack
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Proof state:
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a : Bool, b : Bool, H : b ⊢ b
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## Proof state:
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no goals
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## Proved: T2
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# theorem T2 (a b : Bool) (H : b) : a ∨ b := or_intror a H
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# |