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: Sarah is driving a car if and only if it is snowing. Sarah is driving a car if and only if it is snowing.
If Sarah drives a car, then it is snowing can be inferred via the biconditional elimination rule. If Sarah drives a car, then it is snowing can be inferred via the biconditional elimination rule. If it snows, then Sarah is driving a car can be inferred via the biconditional elimination rule. If it snows, then Sarah is driving a car can be inferred via the biconditional elimination rule.