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 x_21, x_21 will not cook. If James cooks, then Jennifer is curious. If Joseph goes running, then Jennifer is curious. If Jennifer were curious, then James is cooking. If Mary were a police officer, then Joseph is running.
If Mary were a police officer, then Jennifer is curious can be inferred via the transitivity rule.