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: Joseph is a soldier or Patricia is listening to a song. For all x_14, if x_14 were a musician, then x_14 is not driving a car. For all x_14, if x_14 were a musician, then x_14 is a soldier. For all x_14, x_14 will drive a car. For all x_14, if x_14 were a soldier, then x_14 is a musician.
For all x_14, x_14 is not a musician can be inferred via the universal modus tollens rule. For all x_14, x_14 is a musician if and only if x_14 is a soldier can be inferred via the universal biconditional introduction rule. For all x_14, x_14 is a soldier if and only if x_14 is a musician can be inferred via the universal biconditional introduction rule.