prop_logic_puzzle / example_num_vars5_depth8 /puzzle_06ac5b423d4d7c59.txt
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new (B β†’ D) β†’ ((C β†’ D) β†’ (A ∨ C β†’ ((A β†’ C) β†’ C ∨ C ∧ (B ∨ E))))
intro
intro
intro
intro
left
cases 2
apply 3
exact 4
exact 5