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_10, if x_10 plays tennis, then x_10 is reading a book. For all x_10, x_10 will play tennis or x_10 will not play squash. There is at least one x_10 for which if x_10 were bored, then x_10 is a janitor. For all x_10, if x_10 reads a book, then x_10 is a janitor. For all x_10, x_10 is bored or x_10 will play squash.
For all x_10, if x_10 plays tennis, then x_10 is a janitor can be inferred via the universal transitivity rule. For all x_10, if x_10 plays squash, then x_10 is playing tennis can be inferred via the universal rewriting rule.