What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_3, x_3 is a politician. For all x_3, x_3 is not a politician or x_3 will play tennis. For all x_3, x_3 will not drive a car or x_3 is a taxi driver.
Nothing can be inferred from these premises.