What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? Michael is climbing a mountain if and only if Elisabeth is poor. If Robert were a politician, then Linda is a cashier. If Linda were a cashier, then Michael is climbing a mountain.
If Robert were a politician, then Michael is climbing a mountain. If Michael climbs a mountain, then Elisabeth is poor. If Elisabeth were poor, then Michael is climbing a mountain.