Consider the following premises. For all x_7, if x_7 makes tea, then x_7 is poor. For all x_7, x_7 is a lawyer if and only if x_7 will make tea. For all x_7, if x_7 were poor, then x_7 is a lawyer. Can we infer the following from them? For all x_7, x_7 will make tea if and only if x_7 is poor.
 From the fact that for all x_7, x_7 is a lawyer if and only if x_7 will make tea we can infer that for all x_7, if x_7 were a lawyer, then x_7 is making tea. From the fact that for all x_7, if x_7 were poor, then x_7 is a lawyer, and that for all x_7, if x_7 were a lawyer, then x_7 is making tea we can infer that for all x_7, if x_7 were poor, then x_7 is making tea. Finally, from the fact that for all x_7, if x_7 makes tea, then x_7 is poor, and that for all x_7, if x_7 were poor, then x_7 is making tea we can infer that for all x_7, x_7 will make tea if and only if x_7 is poor. Therefore, the answer is yes.