What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_16, if x_16 were sad, then x_16 is working. For all x_16, if x_16 drinks water, then x_16 is playing tennis. For all x_16, if x_16 plays tennis, then x_16 is not working. For all x_16, x_16 is sad or x_16 will play squash. There is at least one x_16 for which if x_16 plays squash, then x_16 is working.
There is at least one x_16 for which x_16 will work.