Consider the following premises. For all x_10, if x_10 were a taxi driver, then x_10 is making tea. For all x_10, x_10 is not a mechanic. For all x_10, x_10 is a taxi driver or x_10 will not make tea. For all x_10, if x_10 makes tea, then x_10 is a mechanic. Can we infer the following from them? There is at least one x_10 for which x_10 is a taxi driver.
 From the fact that for all x_10, if x_10 makes tea, then x_10 is a mechanic, and that for all x_10, x_10 is not a mechanic we can infer that for all x_10, x_10 will not make tea. From the fact that for all x_10, x_10 is a taxi driver or x_10 will not make tea we can infer that for all x_10, if x_10 makes tea, then x_10 is a taxi driver. From the fact that for all x_10, if x_10 makes tea, then x_10 is a taxi driver, and that for all x_10, if x_10 were a taxi driver, then x_10 is making tea we can infer that for all x_10, x_10 will make tea if and only if x_10 is a taxi driver. From the fact that for all x_10, x_10 will make tea if and only if x_10 is a taxi driver we can infer that for all x_10, if x_10 were a taxi driver, then x_10 is making tea. Finally, from the fact that for all x_10, if x_10 were a taxi driver, then x_10 is making tea, and that for all x_10, x_10 will not make tea we can infer that for all x_10, x_10 is not a taxi driver, which contradicts that There is at least one x_10 for which x_10 is a taxi driver. Therefore, the answer is no.