(A → (B → C)) → ((B ∧ ¬ C) → ¬ A) prove of this example on lean language.
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answerhappygod
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(A → (B → C)) → ((B ∧ ¬ C) → ¬ A) prove of this example on lean language.
(A → (B → C)) → ((B ∧ ¬ C) → ¬ A) prove of this example on lean language.
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