0f4b344
1
2
3
4
5
6
7
8
9
10
11
12
13
14
new ((C → E) → F) → (F → (((B → E) → A) → ((F ∨ A) ∧ (B ∧ D) → (D → ((D → E) → E))))) intro intro intro intro cases 3 intro intro cases 3 cases 5 cases 9 apply 7 exact 6
