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, if x_12 were poor, then x_12 is driving a car. Joseph is not driving a car. For all x_12, if x_12 drives a car, then x_12 is poor. If Joseph were not poor, then it is sunny.
For all x_12, x_12 is poor if and only if x_12 will drive a car. For all x_12, x_12 will drive a car if and only if x_12 is poor.