15 lines
465 B
Text
15 lines
465 B
Text
example (hp : p) (hq : p → q) (hr : p → r) : (s ∨ q) ∧ (r ∨ s) := by
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constructor
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case' left => apply Or.inr
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case' right => apply Or.inl
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case' left => apply hq
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case' right => apply hr
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all_goals assumption
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example (hp : p) (hq : p → q) (hr : p → r) : (p ∧ q) ∧ (r ∧ p) := by
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constructor
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case' left => constructor
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case' right => constructor
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case' right.left => apply hr
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case' left.right => apply hq
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all_goals assumption
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