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 not play squash. For all x, x will play squash or x is not a doctor. For all x, x is a doctor or x will not play squash.
For all x, if x were a doctor, then x is playing squash. For all x, if x plays squash, then x is a doctor.