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 plays squash, then x_6 is playing tennis. For all x_6, if x_6 plays tennis, then x_6 is sleeping. If Linda drinks water, then Thomas is playing squash.
For all x_6, if x_6 plays squash, then x_6 is sleeping.