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, if x_12 were a taxi driver, then x_12 is not playing a game. If Richard were a police officer, then David is a taxi driver. For all x_12, x_12 will play a game and x_12 is an astronaut.
For all x_12, x_12 will play a game. For all x_12, x_12 is an astronaut.