What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all y, y is not a mechanic. There is at least one y for which if y plays a game, then y is a mechanic. For all y, y will play a game if and only if y is a mechanic.
There is at least one y for which y will not play a game. For all y, if y plays a game, then y is a mechanic. For all y, if y were a mechanic, then y is playing a game. For all y, y will not play a game.