prop_logic_puzzle / example_num_vars5_depth7 /puzzle_15e62af33f5898e1.txt
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new (A β†’ D) β†’ (((A β†’ D) β†’ E) β†’ (B ∧ A β†’ (C ∨ C β†’ ((E ∨ C β†’ B) β†’ D ∨ (A ∧ B β†’ A)))))
intro
intro
intro
cases 2
intro
intro
cases 2
left
apply 0
exact 4