prop_logic_puzzle / example_num_vars4_depth11 /puzzle_12daf8959cdc6736.txt
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new (B → C ∧ B) → (B → (A ∧ B → B ∧ ((A ∨ A) ∨ B)))
intro
intro
intro
cases 2
cases 2
constructor
exact 1
left
left
exact 3