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 y_1, y_1 will read a book and y_1 will sleep.
For all y_1, y_1 will read a book can be inferred via the universal simplification rule. For all y_1, y_1 will sleep can be inferred via the universal simplification rule.