prop_logic_puzzle / example_num_vars7_depth6 /puzzle_52eeb0bde67090c5.txt
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new (E β†’ A ∧ F) β†’ (D β†’ (((G β†’ F) β†’ B) β†’ (G ∧ A β†’ (E β†’ ((G β†’ F) β†’ B) ∧ (G β†’ E)))))
intro
intro
intro
intro
cases 3
intro
cases 3
constructor
exact 2
intro
cases 3
exact 6