What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_12, x_12 is not a taxi driver. If David were a taxi driver, then it is overcast. If James drives a car, then David is a taxi driver. If it is overcast, then James is driving a car.
If David were a taxi driver, then James is driving a car. If it is overcast, then David is a taxi driver.