What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x, if x were a politician, then x is working. For all x, if x works, then x is playing squash. For all x, if x drinks water, then x is a politician. There is at least one x for which x will play squash if and only if x will drink water.
For all x, if x were a politician, then x is playing squash. For all x, if x drinks water, then x is working. There is at least one x for which if x plays squash, then x is drinking water. There is at least one x for which if x drinks water, then x is playing squash.