What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_6, if x_6 plays a game, then x_6 is not an office clerk. For all x_6, x_6 is an office clerk or x_6 will not play tennis. For all x_6, x_6 will read a book or x_6 will play tennis. For all x_6, if x_6 reads a book, then x_6 is an office clerk.
For all x_6, if x_6 plays tennis, then x_6 is an office clerk.