What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_6, if x_6 were a musician, then x_6 is playing squash. For all x_6, x_6 will sleep or x_6 will not play squash. For all x_6, if x_6 sleeps, then x_6 is a musician.
For all x_6, if x_6 sleeps, then x_6 is playing squash. For all x_6, if x_6 plays squash, then x_6 is sleeping.