What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_14, if x_14 were a taxi driver, then x_14 is driving a car. There is at least one x_14 for which if x_14 drives a car, then x_14 is a server. For all x_14, if x_14 drives a car, then x_14 is a taxi driver. For all x_14, x_14 is a taxi driver if and only if x_14 is an office clerk.
There is at least one x_14 for which if x_14 were a taxi driver, then x_14 is a server. For all x_14, x_14 is a taxi driver if and only if x_14 will drive a car. For all x_14, x_14 will drive a car if and only if x_14 is a taxi driver. For all x_14, if x_14 were a taxi driver, then x_14 is an office clerk. For all x_14, if x_14 were an office clerk, then x_14 is a taxi driver.