prop_logic_puzzle / example_num_vars7_depth6 /puzzle_05c59ac643ec6db9.txt
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new A β†’ ((C β†’ A ∧ G) β†’ (D β†’ (D β†’ (C β†’ (D ∧ E β†’ D ∨ A)))))
intro
intro
intro
intro
intro
intro
cases 5
cases 5
left
exact 2