What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_7, x_7 is sad or x_7 will climb a mountain. For all x_7, x_7 is a musician. There is at least one x_7 for which x_7 is not sad or x_7 will work. For all x_7, if x_7 climbs a mountain, then x_7 is not a musician.
For all x_7, x_7 will not climb a mountain. There is at least one x_7 for which x_7 will climb a mountain or x_7 will work.