What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x, x will sleep. For all x, if x plays tennis, then x is a scientist. For all x, x will drive a car or x is an artist. For all x, if x were an artist, then x is playing tennis. For all x, if x drives a car, then x is a scientist.
For all x, if x were an artist, then x is a scientist.