Consider the following premises. For all x_14, if x_14 makes tea, then x_14 is sleeping. Thomas is a taxi driver if and only if Richard is a soldier. For all x_14, if x_14 were a politician, then x_14 is making tea. For all x_14, x_14 will not sleep. For all x_14, x_14 is a soldier if and only if x_14 is a politician. Can we infer the following from them? If we can, name the inference rule being used: Thomas is a taxi driver.
 From the fact that for all x_14, if x_14 makes tea, then x_14 is sleeping, and that for all x_14, x_14 will not sleep we can infer that for all x_14, x_14 will not make tea via universal modus tollens. From the fact that for all x_14, if x_14 were a politician, then x_14 is making tea, and that for all x_14, x_14 will not make tea we can infer that for all x_14, x_14 is not a politician via universal modus tollens. From the fact that for all x_14, x_14 is a soldier if and only if x_14 is a politician, and that for all x_14, x_14 is not a politician we can infer that for all x_14, x_14 is not a soldier via universal biconditional elimination. From the fact that for all x_14, x_14 is not a soldier we can infer that Richard is not a soldier via universal instantiation. Finally, from the fact that Thomas is a taxi driver if and only if Richard is a soldier, and that Richard is not a soldier we can infer that Thomas is not a taxi driver via biconditional elimination, which contradicts that Thomas is a taxi driver. Therefore, the answer is no.