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 it is snowing. It is snowing or Linda is not poor.
If Linda were poor, then it is snowing can be inferred via the rewriting rule. If it is late, then it is snowing can be inferred via the biconditional elimination rule. If it snows, then it is late can be inferred via the biconditional elimination rule.