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_8, x_8 is excited. For all x_8, x_8 is not happy. For all x_8, x_8 is happy or x_8 will read a book.
For all x_8, x_8 will read a book can be inferred via the universal disjunctive syllogism rule.