File size: 249 Bytes
197785f | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 | new (C ∨ A → C) → (A → ((C → A ∧ C) → (C → ((D ∧ (B ∧ C) ∨ (B → D) → (C ∨ B) ∧ (B ∧ B)) → (D ∨ A) ∧ ((A ∨ B) ∧ A))))) intro intro intro intro intro constructor right exact 1 constructor left exact 1 exact 1 |