What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? If Thomas sleeps, then Susan is making tea. For all x_17, if x_17 makes tea, then x_17 is playing squash. If Susan plays squash, then Thomas is sleeping. Susan is playing squash.
If Susan plays squash, then Susan is making tea. There is at least one x for which x will play squash.