What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? There is at least one y for which if y drives a car, then y is drinking water. For all y, if y were a carpenter, then y is driving a car. For all y, if y drinks water, then y is a carpenter. For all y, y will drink water if and only if y will drive a car.
For all y, if y drinks water, then y is driving a car. There is at least one y for which if y drives a car, then y is a carpenter. There is at least one y for which if y were a carpenter, then y is drinking water. For all y, if y drinks water, then y is driving a car. For all y, if y drives a car, then y is drinking water.