Consider the following premises. For all x_12, x_12 is a scientist. There is at least one x_12 for which if x_12 were a lawyer, then x_12 is not a scientist. For all x_12, x_12 is a lawyer if and only if x_12 will make tea. Can we infer the following from them? For all x_12, x_12 will make tea.
 From the fact that for all x_12, x_12 is a lawyer if and only if x_12 will make tea we can infer that for all x_12, if x_12 makes tea, then x_12 is a lawyer. From the fact that there is at least one x_12 for which if x_12 were a lawyer, then x_12 is not a scientist, and that for all x_12, x_12 is a scientist we can infer that there is at least one x_12 for which x_12 is not a lawyer. Finally, from the fact that for all x_12, if x_12 makes tea, then x_12 is a lawyer, and that there is at least one x_12 for which x_12 is not a lawyer we can infer that there is at least one x_12 for which x_12 will not make tea, which contradicts that For all x_12, x_12 will make tea. Therefore, the answer is no.