What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_9, x_9 will take a plane or x_9 is a politician. For all x_9, x_9 will write a letter. For all x_9, x_9 will not take a plane. For all x_9, x_9 is not a politician or x_9 will play a game.
For all x_9, x_9 is a politician.