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60e415a | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 | new C → (((G → D) → D) → ((B → C ∧ C) → (E ∧ G → ((C ∧ (B ∨ C) → G ∧ E) → (G → (F → (G ∧ H → (A → A ∨ C)))))))) intro intro intro intro cases 3 intro intro intro intro cases 9 cases 3 cases 9 intro cases 3 cases 9 left exact 16 |