prop_logic_puzzle / example_num_vars10_depth7 /puzzle_2678f0039e65da69.txt
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new (B β†’ I) β†’ (E ∧ F β†’ ((E β†’ I) β†’ (E ∧ F) ∧ (E ∧ I ∨ A)))
intro
intro
cases 1
intro
cases 1
constructor
exact 1
left
constructor
exact 2
apply 4
exact 2