5 lines
160 B
Text
5 lines
160 B
Text
theorem ex1 (p q r : Prop) (h1 : p ∨ q) (h2 : p → q) : q := by
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theorem ex2 (p q r : Prop) (h1 : p ∨ q) (h2 : p → q) : q := by
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cases h1
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case inl =>
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