prop_logic_puzzle / example_num_vars5_depth6 /puzzle_7fbf9f63d04ea3b1.txt
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new C ∧ E β†’ (A β†’ ((D ∧ D β†’ D) ∧ C β†’ (C ∧ A β†’ ((E ∨ D) ∨ B) ∨ (D β†’ D))))
intro
cases 0
intro
intro
cases 4
intro
cases 7
cases 0
cases 4
cases 7
left
left
left
exact 2