What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_6, if x_6 were curious, then x_6 is sad. For all x_6, if x_6 were sad, then x_6 is playing a game. For all x_6, if x_6 plays a game, then x_6 is curious. For all x_6, if x_6 were fast, then x_6 is sad.
For all x_6, if x_6 were curious, then x_6 is playing a game. For all x_6, if x_6 were sad, then x_6 is curious. For all x_6, if x_6 plays a game, then x_6 is sad. For all x_6, if x_6 were fast, then x_6 is playing a game.