new ((B → C) → A) → (((I → B) → F) → (((J → B) → F) → (G ∧ C → (((C → I) → B) → (G ∧ F → (((A → G) → I) → ((B ∧ B → (B → A)) → ((H ∧ J ∨ I) ∧ I) ∧ B)))))))
intro
intro
intro
intro
cases 3
intro
intro
cases 7
intro
cases 3
cases 7
intro
cases 3
cases 7
constructor
constructor
right
apply 10
intro
cases 3
cases 7
exact 4
apply 10
intro
cases 3
cases 7
exact 4
apply 6
intro
cases 3
cases 7
apply 10
intro
cases 3
cases 7
exact 4