prop_logic_puzzle / example_num_vars4_depth10 /puzzle_2fff0935f39255bf.txt
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new D β†’ (A β†’ ((C β†’ B ∧ D) β†’ ((D β†’ C) β†’ C ∨ D ∧ (A ∨ D))))
intro
intro
intro
intro
left
apply 3
exact 0