Consider the following premises. For all x_13, x_13 is a taxi driver or x_13 will drive a car. There is at least one x_13 for which x_13 is a taxi driver if and only if x_13 will make tea. For all x_13, if x_13 were a lawyer, then x_13 is not making tea. For all x_13, if x_13 drives a car, then x_13 is making tea. Can we infer the following from them? There is at least one x_13 for which x_13 is not a lawyer.
 From the fact that there is at least one x_13 for which x_13 is a taxi driver if and only if x_13 will make tea we can infer that there is at least one x_13 for which if x_13 were a taxi driver, then x_13 is making tea. From the fact that there is at least one x_13 for which if x_13 were a taxi driver, then x_13 is making tea, that for all x_13, if x_13 drives a car, then x_13 is making tea, and that for all x_13, x_13 is a taxi driver or x_13 will drive a car we can infer that there is at least one x_13 for which x_13 will make tea. Finally, from the fact that for all x_13, if x_13 were a lawyer, then x_13 is not making tea, and that there is at least one x_13 for which x_13 will make tea we can infer that there is at least one x_13 for which x_13 is not a lawyer. Therefore, the answer is yes.