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 and x_12 will play a game. For all x_12, if x_12 were a doctor, then x_12 is drinking water. There is at least one x_12 for which x_12 is a doctor.
There is at least one x_12 for which x_12 will drink water. For all x_12, x_12 will write a letter. For all x_12, x_12 will play a game.