Consider the following premises. For all z, z is a sailor. For all z, z will not climb a mountain. For all z, z will climb a mountain or z is a server. Can we infer the following from them? If we can, name the inference rule being used: For all z, z is a server and z is a sailor.
 From the fact that for all z, z will climb a mountain or z is a server, and that for all z, z will not climb a mountain we can infer that for all z, z is a server via universal disjunctive syllogism. Finally, from the fact that for all z, z is a server, and that for all z, z is a sailor we can infer that for all z, z is a server and z is a sailor via universal conjunction. Therefore, the answer is yes.