Consider the following premises. For all x, if x were an office clerk, then x is making tea. For all x, if x makes tea, then x is an office clerk. For all x, x will not drive a car. For all x, if x were an office clerk, then x is driving a car. Can we infer the following from them? There is at least one x for which x will make tea.
 From the fact that for all x, if x were an office clerk, then x is driving a car, and that for all x, x will not drive a car we can infer that for all x, x is not an office clerk. From the fact that for all x, if x were an office clerk, then x is making tea, and that for all x, if x makes tea, then x is an office clerk we can infer that for all x, x is an office clerk if and only if x will make tea. Finally, from the fact that for all x, x is an office clerk if and only if x will make tea, and that for all x, x is not an office clerk we can infer that for all x, x will not make tea, which contradicts that There is at least one x for which x will make tea. Therefore, the answer is no.