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: For all x_12, if x_12 were an artist, then x_12 is not a soldier. For all x_12, x_12 will drive a car if and only if x_12 is a soldier. There is at least one x_12 for which if x_12 goes running, then x_12 is a soldier. For all x_12, x_12 will go running or x_12 will drive a car.
For all x_12, if x_12 drives a car, then x_12 is a soldier can be inferred via the universal biconditional elimination rule. For all x_12, if x_12 were a soldier, then x_12 is driving a car can be inferred via the universal biconditional elimination rule.