What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_7, if x_7 were happy, then x_7 is fast. For all x_7, x_7 is a bartender if and only if x_7 will play squash. For all x_7, if x_7 were fast, then x_7 is a bartender.
For all x_7, if x_7 were happy, then x_7 is a bartender. For all x_7, if x_7 were a bartender, then x_7 is playing squash. For all x_7, if x_7 plays squash, then x_7 is a bartender.