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 not cold. It is cold if and only if it is raining. It is raining or Linda is playing squash.
If it is cold, then it is raining can be inferred via the biconditional elimination rule. If it rains, then it is cold can be inferred via the biconditional elimination rule. It is not raining can be inferred via the biconditional elimination rule.