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_6, if x_6 were excited, then x_6 is reading a book. There is at least one x_6 for which x_6 will sleep. For all x_6, if x_6 were bored, then x_6 is reading a book. For all x_6, x_6 is excited or x_6 is bored.
For all x_6, x_6 will read a book can be inferred via the universal disjunction elimination rule.