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: For all z_1, z_1 will play a game or z_1 is a server. If Robert cooks, then Karen is fast. If it is windy, then Karen is fast. James is not playing a game. It is windy or Robert is cooking.
Karen is fast can be inferred via the disjunction elimination rule.