prop_logic_puzzle / example_num_vars8_depth8 /puzzle_46c29d857801c0bf.txt
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new (E β†’ D) β†’ ((E β†’ B ∧ H) β†’ (B ∧ E β†’ (B β†’ E) ∨ B))
intro
intro
intro
cases 2
cases 2
left
intro
cases 2
exact 4