Consider the following premises. For all x_6, x_6 is not a musician. For all x_6, if x_6 were a musician, then x_6 is a nurse. There is at least one x_6 for which if x_6 were a nurse, then x_6 is a musician. Can we infer the following from them? If we can, name the inference rule being used: For all x_6, if x_6 were a musician, then x_6 is a nurse.
That is one of the premises. Therefore, the answer is yes.