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5e06520 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 | new ((F → G) → F) → ((C → A ∧ F) → ((F → D) ∧ (B → D) → (C ∨ F → (F → (B ∧ A → (F ∨ B) ∨ (((C → G) ∨ (A ∨ C)) ∨ (A ∨ E ∧ G))))))) intro intro intro cases 2 intro intro intro cases 7 cases 2 cases 7 left left exact 6 |