What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x, x will play a game if and only if x is happy. There is at least one x for which if x were fast, then x is happy. For all x, if x plays a game, then x is fast.
There is at least one x for which if x plays a game, then x is happy. For all x, if x plays a game, then x is happy. For all x, if x were happy, then x is playing a game.