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