Consider the following premises. For all x_10, if x_10 were a lawyer, then x_10 is a scientist. For all x_10, x_10 is a lawyer. If James were a scientist, then Robert is sleeping. Can we infer the following from them? If we can, name the inference rule being used: Robert is not sleeping.
 From the fact that for all x_10, if x_10 were a lawyer, then x_10 is a scientist, and that for all x_10, x_10 is a lawyer we can infer that for all x_10, x_10 is a scientist via universal modus ponens. From the fact that for all x_10, x_10 is a scientist we can infer that James is a scientist via universal instantiation. Finally, from the fact that if James were a scientist, then Robert is sleeping, and that James is a scientist we can infer that Robert is sleeping via modus ponens, which contradicts that Robert is not sleeping. Therefore, the answer is no.