What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? There is at least one x_7 for which if x_7 sleeps, then x_7 is playing tennis. For all x_7, x_7 will play squash if and only if x_7 will sleep. For all x_7, x_7 will play squash.
For all x_7, if x_7 plays squash, then x_7 is sleeping. For all x_7, if x_7 sleeps, then x_7 is playing squash.