File size: 296 Bytes
5e06520 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 | new (D ∨ E → D) → (B ∧ C → (A ∧ E → (D → (A → (C ∧ F → B ∧ ((B ∧ D) ∧ (F → A))))))) intro intro cases 1 intro cases 4 intro intro intro cases 9 cases 1 cases 4 cases 9 constructor exact 2 constructor constructor exact 2 exact 7 intro cases 1 cases 4 cases 9 exact 5 |