What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? If Patricia works, then it is snowing. Patricia is working. If Karen drives a car, then it is snowing. If it snows, then Barbara is cooking. If Barbara cooks, then Patricia is working.
It is snowing. If Patricia works, then Barbara is cooking. If Karen drives a car, then Barbara is cooking. If it snows, then Patricia is working. If Barbara cooks, then it is snowing.