File size: 202 Bytes
18c594f | 1 2 3 4 5 6 7 8 9 10 11 12 13 | new B ∧ D → (B ∨ (B → D) → (D → (C ∨ (((B ∨ C) ∨ (C → A) ∧ (A → C)) ∨ (D ∧ A → D ∨ A))) ∨ C ∧ A)) intro cases 0 intro intro cases 0 left right left left left exact 1 |