Consider the following premises. For all x_3, if x_3 climbs a mountain, then x_3 is sad. For all x_3, x_3 is not sad or x_3 is a poet. For all x_3, x_3 will climb a mountain. Can we infer the following from them? There is at least one x_3 for which neither x_3 will drive a car nor x_3 is a poet.
 From the fact that for all x_3, if x_3 climbs a mountain, then x_3 is sad, and that for all x_3, x_3 will climb a mountain we can infer that for all x_3, x_3 is sad. From the fact that for all x_3, x_3 is sad we can infer that for all x_3, x_3 is sad or x_3 will drive a car. Finally, from the fact that for all x_3, x_3 is sad or x_3 will drive a car, and that for all x_3, x_3 is not sad or x_3 is a poet we can infer that for all x_3, x_3 will drive a car or x_3 is a poet, which contradicts that There is at least one x_3 for which neither x_3 will drive a car nor x_3 is a poet. Therefore, the answer is no.