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: If James were rich, then Karen is excited. James is sleeping if and only if Karen is excited. For all x_10, x_10 is a lawyer or x_10 will sleep. For all x_10, x_10 is not a lawyer or x_10 is rich.
If James sleeps, then Karen is excited can be inferred via the biconditional elimination rule. If Karen were excited, then James is sleeping can be inferred via the biconditional elimination rule. For all x_10, x_10 will sleep or x_10 is rich can be inferred via the universal resolution rule.