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