What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? Name the inference rule being used: For all y, if y drives a car, then y is drinking water. For all y, y will play a game if and only if y will drink water. There is at least one y for which y will drive a car or y will play a game.
For all y, if y plays a game, then y is drinking water can be inferred via the universal biconditional elimination rule. For all y, if y drinks water, then y is playing a game can be inferred via the universal biconditional elimination rule.