What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_8, x_8 will go running or x_8 will play squash. Mary is playing a game if and only if Barbara is playing squash. If Barbara goes running, then Mary is playing a game.
If Mary plays a game, then Barbara is playing squash. If Barbara plays squash, then Mary is playing a game.