prop_logic_puzzle / example_num_vars7_depth7 /puzzle_053595f151be3bc1.txt
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new (E ∨ A β†’ C) β†’ ((B β†’ A) β†’ ((C β†’ B) β†’ ((E β†’ G) β†’ (E ∨ F β†’ ((D β†’ D ∨ C) β†’ (B ∧ A β†’ E ∨ ((G β†’ F) ∨ B)))))))
intro
intro
intro
intro
intro
intro
intro
cases 6
cases 6
right
right
exact 7