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 plays squash, then x_7 is a bartender. For all x_7, x_7 will drive a car. For all x_7, x_7 will not drive a car or x_7 is a doctor. For all x_7, if x_7 were a janitor, then x_7 is a bartender. For all x_7, if x_7 were a doctor, then x_7 is a janitor.
For all x_7, if x_7 were a doctor, then x_7 is a bartender.