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_15, x_15 will drink water and x_15 is happy. Susan is climbing a mountain. For all x_15, x_15 will read a book.
For all x_15, x_15 will drink water can be inferred via the universal simplification rule. For all x_15, x_15 is happy can be inferred via the universal simplification rule.