prop_logic_puzzle / example_num_vars7_depth10 /puzzle_5fd2eb4760a4c57f.txt
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new E ∨ F β†’ (((C β†’ E) β†’ C) β†’ (D ∨ E β†’ (E ∧ G β†’ (((C β†’ F) β†’ D) β†’ E))))
intro
intro
intro
intro
cases 3
intro
cases 3
exact 4