What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? Elisabeth is not climbing a mountain. If Jennifer takes a plane, then Barbara is poor. For all x_11, x_11 is a police officer if and only if x_11 will climb a mountain. Jennifer is taking a plane.
Barbara is poor. Elisabeth is not climbing a mountain and Jennifer is taking a plane. Jennifer is taking a plane and Elisabeth is not climbing a mountain. For all x_11, if x_11 were a police officer, then x_11 is climbing a mountain. For all x_11, if x_11 climbs a mountain, then x_11 is a police officer.