Consider the following premises. For all x_5, if x_5 plays squash, then x_5 is a mechanic. For all x_5, if x_5 takes a plane, then x_5 is a mechanic. For all x_5, x_5 will play squash and x_5 is bored. Can we infer the following from them? There is at least one x_5 for which x_5 is not a mechanic.
 From the fact that for all x_5, x_5 will play squash and x_5 is bored we can infer that for all x_5, x_5 will play squash. From the fact that for all x_5, x_5 will play squash we can infer that for all x_5, x_5 will play squash or x_5 will take a plane. Finally, from the fact that for all x_5, if x_5 plays squash, then x_5 is a mechanic, that for all x_5, if x_5 takes a plane, then x_5 is a mechanic, and that for all x_5, x_5 will play squash or x_5 will take a plane we can infer that for all x_5, x_5 is a mechanic, which contradicts that There is at least one x_5 for which x_5 is not a mechanic. Therefore, the answer is no.