Consider the following premises. If it rains, then Joseph is a sailor. If James were a musician, then Joseph is a sailor. For all y, y is a musician. Can we infer the following from them? Joseph is a sailor.
 From the fact that for all y, y is a musician we can infer that James is a musician. From the fact that James is a musician we can infer that James is a musician or it is raining. Finally, from the fact that if James were a musician, then Joseph is a sailor, that if it rains, then Joseph is a sailor, and that James is a musician or it is raining we can infer that Joseph is a sailor. Therefore, the answer is yes.