What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x, x is a mechanic or x is not a bartender. There is at least one x for which x is a bartender or x is not a mechanic.
For all x, if x were a bartender, then x is a mechanic. There is at least one x for which if x were a mechanic, then x is a bartender.