prop_logic_puzzle / example_num_vars4_depth8 /puzzle_1efda9af4f3a1f68.txt
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new B ∧ A → (A ∨ C → ((C → B ∧ A) → (A ∨ A) ∧ B ∨ (B ∨ D) ∧ B))
intro
cases 0
intro
intro
cases 0
left
constructor
left
exact 2
exact 1