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_7, x_7 is happy and x_7 will play squash. For all x_7, x_7 will play tennis and x_7 will drink water.
For all x_7, x_7 is happy can be inferred via the universal simplification rule. For all x_7, x_7 will play squash can be inferred via the universal simplification rule. For all x_7, x_7 will play tennis can be inferred via the universal simplification rule. For all x_7, x_7 will drink water can be inferred via the universal simplification rule.