Translate the following inference to logic notation: For all x, x_13 is a soldier or x_13 is not a nurse. For all x, x_13 is a soldier or x_13 is not a janitor. For all x, x_13 is a nurse. Therefore William is a soldier.
forall x: P(x) or ~Q(x). forall x: P(x) or ~R(x). forall x: Q(x). Therefore P(a).