File size: 219 Bytes
b324fea | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 | new (C → A) → ((D → A) → (D → (E ∧ D → ((E → C) → (C → ((B → C) → E)) ∨ (D ∧ B ∨ A) ∧ (F → A))))) intro intro intro intro cases 3 intro cases 3 left intro cases 3 intro cases 3 exact 4 |