What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? Linda is not fast. If Linda were fast, then it is snowing. If it snows, then Linda is fast. If Linda were fast, then it is snowing.
It is not snowing. Linda is fast if and only if it is snowing. It is snowing if and only if Linda is fast. It is snowing if and only if Linda is fast. Linda is fast if and only if it is snowing.