Consider the following premises. Patricia is excited. For all x_13, if x_13 goes running, then x_13 is not excited. For all x_13, if x_13 plays a game, then x_13 is running. For all x_13, if x_13 were a taxi driver, then x_13 is playing a game. Can we infer the following from them? For all x_13, x_13 is a taxi driver.
 From the fact that Patricia is excited we can infer that there is at least one x_13 for which x_13 is excited. From the fact that for all x_13, if x_13 were a taxi driver, then x_13 is playing a game, and that for all x_13, if x_13 plays a game, then x_13 is running we can infer that for all x_13, if x_13 were a taxi driver, then x_13 is running. From the fact that for all x_13, if x_13 goes running, then x_13 is not excited, and that there is at least one x_13 for which x_13 is excited we can infer that there is at least one x_13 for which x_13 will not go running. Finally, from the fact that for all x_13, if x_13 were a taxi driver, then x_13 is running, and that there is at least one x_13 for which x_13 will not go running we can infer that there is at least one x_13 for which x_13 is not a taxi driver, which contradicts that For all x_13, x_13 is a taxi driver. Therefore, the answer is no.