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_4 for which x_4 is excited if and only if x_4 is a server. For all x_4, if x_4 were a mechanic, then x_4 is excited.
There is at least one x_4 for which if x_4 were excited, then x_4 is a server. There is at least one x_4 for which if x_4 were a server, then x_4 is excited.