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 drives a car, then x_7 is not sad. For all x_7, x_7 is a bartender and x_7 is a doctor. For all x_7, if x_7 were a bartender, then x_7 is sad.
For all x_7, x_7 is a bartender. For all x_7, x_7 is a doctor.