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_16, x_16 will play squash. For all x_16, x_16 will play a game and x_16 is curious. For all x_16, if x_16 plays squash, then x_16 is happy. There is at least one x_16 for which if x_16 plays a game, then x_16 is taking a plane.
For all x_16, x_16 is happy can be inferred via the universal modus ponens rule. For all x_16, x_16 will play a game can be inferred via the universal simplification rule. For all x_16, x_16 is curious can be inferred via the universal simplification rule.