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 Charles sleeps, then David is running. For all x_12, x_12 will sleep and x_12 is excited.
For all x_12, x_12 will sleep can be inferred via the universal simplification rule. For all x_12, x_12 is excited can be inferred via the universal simplification rule.