File size: 237 Bytes
18c594f | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 | new C ∨ B → (A ∧ B → ((D ∨ A → B) → (((B → C) → C) → (E ∧ B → A ∧ ((C → D) → E ∨ D))))) intro intro cases 1 intro intro intro cases 6 cases 1 cases 6 constructor exact 2 intro cases 1 cases 6 left exact 7 |