What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? If Sarah were a mechanic, then Richard is a bartender. If Joseph climbs a mountain, then William is cooking. If William cooks, then Sarah is a mechanic. If Richard were a bartender, then Joseph is climbing a mountain.
If Sarah were a mechanic, then Joseph is climbing a mountain. If Joseph climbs a mountain, then Sarah is a mechanic. If William cooks, then Richard is a bartender. If Richard were a bartender, then William is cooking.