Consider the following premises. There is at least one x_8 for which x_8 will play squash. For all x_8, x_8 is a musician. For all x_8, x_8 will take a plane if and only if x_8 is a musician. Can we infer the following from them? For all x_8, either x_8 will play squash or x_8 will take a plane are not true.
 From the fact that for all x_8, x_8 will take a plane if and only if x_8 is a musician we can infer that for all x_8, if x_8 were a musician, then x_8 is taking a plane. From the fact that for all x_8, if x_8 were a musician, then x_8 is taking a plane, and that for all x_8, x_8 is a musician we can infer that for all x_8, x_8 will take a plane. Finally, from the fact that there is at least one x_8 for which x_8 will play squash, and that for all x_8, x_8 will take a plane we can infer that there is at least one x_8 for which x_8 will play squash and x_8 will take a plane, which contradicts that For all x_8, either x_8 will play squash or x_8 will take a plane are not true. Therefore, the answer is no.