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 windy or it is not sunny. It is not windy. It is sunny if and only if Linda is running.
It is not sunny can be inferred via the disjunctive syllogism rule. If it is sunny, then it is windy can be inferred via the rewriting rule. If it is sunny, then Linda is running can be inferred via the biconditional elimination rule. If Linda goes running, then it is sunny can be inferred via the biconditional elimination rule.