What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? Name the inference rule being used: It is cloudy if and only if Susan is drinking water. It is not cold or it is cloudy. If Patricia cooks, then Susan is drinking water. It is cold or Patricia is cooking.
Patricia is cooking or it is cloudy can be inferred via the resolution rule. If it is cloudy, then Susan is drinking water can be inferred via the biconditional elimination rule. If Susan drinks water, then it is cloudy can be inferred via the biconditional elimination rule.