Consider the following premises. For all x_8, if x_8 were a poet, then x_8 is taking a plane. For all x_8, if x_8 takes a plane, then x_8 is a poet. If Linda takes a plane, then Linda is a poet. Can we infer the following from them? Linda is a poet if and only if Linda is taking a plane.
 From the fact that for all x_8, if x_8 were a poet, then x_8 is taking a plane, and that for all x_8, if x_8 takes a plane, then x_8 is a poet we can infer that for all x_8, x_8 is a poet if and only if x_8 will take a plane. Finally, from the fact that for all x_8, x_8 is a poet if and only if x_8 will take a plane we can infer that Linda is a poet if and only if Linda is taking a plane. Therefore, the answer is yes.