prop_logic_puzzle / example_num_vars5_depth8 /puzzle_1e47ba90f2906166.txt
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new D β†’ (B ∨ D β†’ (B ∧ A β†’ ((D ∨ B β†’ C) β†’ (((B β†’ E) β†’ B) β†’ (B ∨ C ∧ B) ∨ ((A β†’ D ∨ E) ∨ (E ∨ D))))))
intro
intro
intro
cases 2
intro
intro
cases 2
left
left
exact 3