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 for which if x plays squash, then x is playing tennis. For all x, x is a server. For all x, x is happy if and only if x will play squash. For all x, if x plays tennis, then x is playing squash. For all x, if x were happy, then x is not a server.
For all x, x is not happy. There is at least one x for which x will play squash if and only if x will play tennis. There is at least one x for which x will play tennis if and only if x will play squash. For all x, if x were happy, then x is playing squash. For all x, if x plays squash, then x is happy.