Translate the following inference to logic notation: For all x, x_9 will drive a car. For all x, x_9 is poor. For all x, x_9 is a writer or x_9 will drink water. For all x, if x_9 were a writer, then x_9 is not driving a car. Therefore John is drinking water.
forall x: P(x). forall x: Q(x). forall x: R(x) or S(x). forall x: R(x) -> ~P(x). Therefore S(a).