What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? Name the inference rule being used: John is a musician or Robert is not a lawyer. John is bored or Robert is a lawyer. For all x_14, x_14 is a musician if and only if x_14 is bored.
If Robert were a lawyer, then John is a musician can be inferred via the rewriting rule. For all x_14, if x_14 were a musician, then x_14 is bored can be inferred via the universal biconditional elimination rule. For all x_14, if x_14 were bored, then x_14 is a musician can be inferred via the universal biconditional elimination rule.