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 late if and only if Karen is playing a game. It is late or it is not snowing.
If it snows, then it is late can be inferred via the rewriting rule. If it is late, then Karen is playing a game can be inferred via the biconditional elimination rule. If Karen plays a game, then it is late can be inferred via the biconditional elimination rule.