Consider the following premises. For all x_9, x_9 is a nurse or x_9 will listen to a song. For all x_9, x_9 will climb a mountain. For all x_9, if x_9 listens to a song, then x_9 is an office clerk. For all x_9, x_9 is an office clerk or x_9 is not a nurse. Can we infer the following from them? If we can, name the inference rule being used: David is not climbing a mountain.
That contradicts the premises. Therefore the answer is no.