What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_12, x_12 will write a letter. For all x_12, x_12 will play a game and x_12 is an astronaut. There is at least one x_12 for which if x_12 plays a game, then x_12 is playing tennis.
For all x_12, x_12 will play a game. For all x_12, x_12 is an astronaut.