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: Jennifer is making tea or Mary is driving a car. It is not cold. If Jennifer makes tea, then it is cold. It is cold if and only if Jennifer is making tea.
Jennifer is not making tea can be inferred via the modus tollens rule. If it is cold, then Jennifer is making tea can be inferred via the biconditional elimination rule. If Jennifer makes tea, then it is cold can be inferred via the biconditional elimination rule. Jennifer is not making tea can be inferred via the biconditional elimination rule.