Consider the following premises. Thomas is not curious. If it is late, then Thomas is a musician. For all x_10, if x_10 were a musician, then x_10 is curious. Can we infer the following from them? If we can, name the inference rule being used: It is late.
 From the fact that for all x_10, if x_10 were a musician, then x_10 is curious we can infer that if Thomas were a musician, then Thomas is curious via universal instantiation. From the fact that if Thomas were a musician, then Thomas is curious, and that Thomas is not curious we can infer that Thomas is not a musician via modus tollens. Finally, from the fact that if it is late, then Thomas is a musician, and that Thomas is not a musician we can infer that it is not late via modus tollens, which contradicts that It is late. Therefore, the answer is no.