What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_10, x_10 will not play tennis or x_10 will work. For all x_10, if x_10 plays a game, then x_10 is a janitor. There is at least one x_10 for which x_10 will play tennis or x_10 will play a game. For all x_10, if x_10 works, then x_10 is an astronaut. For all x_10, x_10 is an astronaut if and only if x_10 is a janitor.
There is at least one x_10 for which x_10 will play a game or x_10 will work. For all x_10, if x_10 were an astronaut, then x_10 is a janitor. For all x_10, if x_10 were a janitor, then x_10 is an astronaut.