Consider the following premises. There is at least one x_7 for which x_7 is a lawyer. For all x_7, x_7 is a lawyer or x_7 is not fast. For all x_7, if x_7 were a lawyer, then x_7 is fast. Can we infer the following from them? There is at least one x_7 for which x_7 is fast.
 From the fact that for all x_7, x_7 is a lawyer or x_7 is not fast we can infer that for all x_7, if x_7 were fast, then x_7 is a lawyer. From the fact that for all x_7, if x_7 were fast, then x_7 is a lawyer, and that for all x_7, if x_7 were a lawyer, then x_7 is fast we can infer that for all x_7, x_7 is fast if and only if x_7 is a lawyer. From the fact that for all x_7, x_7 is fast if and only if x_7 is a lawyer we can infer that for all x_7, if x_7 were a lawyer, then x_7 is fast. Finally, from the fact that for all x_7, if x_7 were a lawyer, then x_7 is fast, and that there is at least one x_7 for which x_7 is a lawyer we can infer that there is at least one x_7 for which x_7 is fast. Therefore, the answer is yes.