What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_1, x_1 is an artist if and only if x_1 will play squash. For all x_1, if x_1 plays squash, then x_1 is an artist.
For all x_1, if x_1 were an artist, then x_1 is playing squash. For all x_1, if x_1 plays squash, then x_1 is an artist.