Consider the following premises. For all x, x is a server if and only if x is a doctor. For all x, x is a server. There is at least one x for which x will make tea. Can we infer the following from them? There is at least one x for which x will make tea and x is a doctor.
 From the fact that for all x, x is a server if and only if x is a doctor we can infer that for all x, if x were a server, then x is a doctor. From the fact that for all x, if x were a server, then x is a doctor, and that for all x, x is a server we can infer that for all x, x is a doctor. Finally, from the fact that there is at least one x for which x will make tea, and that for all x, x is a doctor we can infer that there is at least one x for which x will make tea and x is a doctor. Therefore, the answer is yes.