Consider the following premises. For all x_14, if x_14 were a police officer, then x_14 is playing squash. For all x_14, if x_14 plays squash, then x_14 is a police officer. For all x_14, x_14 will not take a plane. There is at least one x_14 for which x_14 will take a plane if and only if x_14 is a police officer. For all x_14, if x_14 plays squash, then x_14 is a police officer. Can we infer the following from them? There is at least one x_14 for which x_14 will not play squash.
 From the fact that for all x_14, if x_14 plays squash, then x_14 is a police officer, and that for all x_14, if x_14 were a police officer, then x_14 is playing squash we can infer that for all x_14, x_14 will play squash if and only if x_14 is a police officer. From the fact that there is at least one x_14 for which x_14 will take a plane if and only if x_14 is a police officer, and that for all x_14, x_14 will not take a plane we can infer that there is at least one x_14 for which x_14 is not a police officer. From the fact that for all x_14, x_14 will play squash if and only if x_14 is a police officer we can infer that for all x_14, if x_14 were a police officer, then x_14 is playing squash. From the fact that for all x_14, if x_14 were a police officer, then x_14 is playing squash, and that for all x_14, if x_14 plays squash, then x_14 is a police officer we can infer that for all x_14, x_14 is a police officer if and only if x_14 will play squash. Finally, from the fact that for all x_14, x_14 is a police officer if and only if x_14 will play squash, and that there is at least one x_14 for which x_14 is not a police officer we can infer that there is at least one x_14 for which x_14 will not play squash. Therefore, the answer is yes.