Consider the following premises. For all x_4, if x_4 were a musician, then x_4 is a poet. For all x_4, x_4 is not a musician. For all x_4, if x_4 takes a plane, then x_4 is a musician. There is at least one x_4 for which if x_4 were a poet, then x_4 is taking a plane. Can we infer the following from them? For all x_4, x_4 will take a plane.
 From the fact that for all x_4, if x_4 were a musician, then x_4 is a poet, and that there is at least one x_4 for which if x_4 were a poet, then x_4 is taking a plane we can infer that there is at least one x_4 for which if x_4 were a musician, then x_4 is taking a plane. From the fact that there is at least one x_4 for which if x_4 were a musician, then x_4 is taking a plane, and that for all x_4, if x_4 takes a plane, then x_4 is a musician we can infer that there is at least one x_4 for which x_4 is a musician if and only if x_4 will take a plane. Finally, from the fact that there is at least one x_4 for which x_4 is a musician if and only if x_4 will take a plane, and that for all x_4, x_4 is not a musician we can infer that there is at least one x_4 for which x_4 will not take a plane, which contradicts that For all x_4, x_4 will take a plane. Therefore, the answer is no.