What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_11, x_11 is an office clerk if and only if x_11 will work. For all x_11, if x_11 climbs a mountain, then x_11 is a musician. For all x_11, if x_11 plays squash, then x_11 is climbing a mountain. For all x_11, x_11 is a musician if and only if x_11 will work. For all x_11, x_11 is not an office clerk.
For all x_11, if x_11 plays squash, then x_11 is a musician. For all x_11, if x_11 were an office clerk, then x_11 is working. For all x_11, if x_11 were a musician, then x_11 is working. For all x_11, if x_11 works, then x_11 is an office clerk. For all x_11, if x_11 works, then x_11 is a musician. For all x_11, x_11 will not work.