prop_logic_puzzle / example_num_vars4_depth8 /puzzle_9d6d304b9ed3360f.txt
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new (A β†’ D) β†’ (C ∧ D β†’ ((B β†’ A) β†’ (B β†’ ((D β†’ (A ∧ B β†’ (B β†’ D) ∧ (D ∧ C))) β†’ B ∧ A))))
intro
intro
cases 1
intro
intro
cases 1
intro
cases 1
constructor
exact 5
apply 4
exact 5