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: Elisabeth is fast if and only if it is windy. It is windy or Elisabeth is not fast.
If Elisabeth were fast, then it is windy can be inferred via the rewriting rule. If Elisabeth were fast, then it is windy can be inferred via the biconditional elimination rule. If it is windy, then Elisabeth is fast can be inferred via the biconditional elimination rule.