prop_logic_puzzle / example_num_vars6_depth9 /puzzle_386171c03d8b5e4a.txt
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new C β†’ (A β†’ ((C β†’ B) β†’ ((B ∨ E β†’ B) β†’ (A β†’ (B ∧ (F ∧ ((B ∨ E) ∨ A)) β†’ B ∨ (E β†’ B ∧ E))))))
intro
intro
intro
intro
intro
intro
cases 5
cases 5
cases 7
cases 9
left
exact 6