prop_logic_puzzle / example_num_vars4_depth11 /puzzle_819c66a99ff4b6a2.txt
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new B ∧ A → (C ∧ A → (D ∧ A → (D ∨ C) ∨ A ∧ B))
intro
cases 0
intro
cases 3
intro
cases 6
cases 0
cases 3
cases 6
left
left
exact 7