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: Richard is a politician if and only if Richard is driving a car. If Michael were fast, then Richard is driving a car. For all y, y is not a politician.
If Richard were a politician, then Richard is driving a car can be inferred via the biconditional elimination rule. If Richard drives a car, then Richard is a politician can be inferred via the biconditional elimination rule.