What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? If Richard cooks, then Karen is running. If Karen goes running, then Richard is cooking. Karen is not running. Thomas is working if and only if Richard is cooking.
Richard is not cooking. Richard is cooking if and only if Karen is running. Karen is running if and only if Richard is cooking. If Thomas works, then Richard is cooking. If Richard cooks, then Thomas is working.