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: William is a mechanic. For all x_11, x_11 will cook and x_11 is a janitor.
For all x_11, x_11 will cook can be inferred via the universal simplification rule. For all x_11, x_11 is a janitor can be inferred via the universal simplification rule.