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 sunny if and only if it is late. It is late or Michael is not driving a car.
If Michael drives a car, then it is late can be inferred via the rewriting rule. If it is sunny, then it is late can be inferred via the biconditional elimination rule. If it is late, then it is sunny can be inferred via the biconditional elimination rule.