23 lines
222 B
Text
23 lines
222 B
Text
first goal
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p q : Prop,
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a : p,
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a_1 : q
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⊢ p ∧ p
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--- Second goal:
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p q : Prop,
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a : p,
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a_1 : q
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⊢ q
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--- After
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p q : Prop,
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a : p,
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a_1 : q
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⊢ p
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p q : Prop,
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a : p,
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a_1 : q
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⊢ p
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should not work
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should not work
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should work
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