What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? Richard is running if and only if William is a server. For all x_14, x_14 will drive a car if and only if x_14 is a server. For all x_12, x_12 will write a letter if and only if x_12 will go running. William is not driving a car.
If Richard goes running, then William is a server. If William were a server, then Richard is running. For all x_14, if x_14 drives a car, then x_14 is a server. For all x_12, if x_12 writes a letter, then x_12 is running. For all x_14, if x_14 were a server, then x_14 is driving a car. For all x_12, if x_12 goes running, then x_12 is writing a letter.