What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all z, if z were an electrician, then z is playing a game. For all z, z will play a game if and only if z is an electrician. For all z, if z were an electrician, then z is playing a game.
For all z, if z plays a game, then z is an electrician. For all z, if z were an electrician, then z is playing a game.