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 x is a scientist or x will not play squash. For all x, if x were a bartender, then x is writing a letter. For all x, x will write a letter if and only if x will play squash.
There is at least one x for which if x plays squash, then x is a scientist. For all x, if x writes a letter, then x is playing squash. For all x, if x plays squash, then x is writing a letter.