prop_logic_puzzle / example_num_vars6_depth11 /puzzle_e157aba2467a1abe.txt
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new (B ∨ A β†’ B) β†’ (A ∧ E β†’ ((E β†’ A) β†’ (D β†’ E) ∧ ((E ∨ C) ∨ D ∧ B)))
intro
intro
cases 1
intro
cases 1
constructor
intro
cases 1
exact 3
left
left
exact 3