prop_logic_puzzle / example_num_vars6_depth9 /puzzle_47a75c55a56edbb3.txt
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new (C β†’ A) β†’ ((D β†’ A) β†’ (D β†’ (E ∧ D β†’ ((E β†’ C) β†’ (C β†’ ((B β†’ C) β†’ E)) ∨ (D ∧ B ∨ A) ∧ (F β†’ A)))))
intro
intro
intro
intro
cases 3
intro
cases 3
left
intro
cases 3
intro
cases 3
exact 4