What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? Joseph is not drinking water. For all x_1, x_1 will play a game if and only if x_1 will drink water.
For all x_1, if x_1 plays a game, then x_1 is drinking water. For all x_1, if x_1 drinks water, then x_1 is playing a game.