Translate the following inference to logic notation: For all x, if x_6 were a mechanic, then x_6 is not an electrician. For all x, x_6 is a mechanic if and only if x_6 will drink water. For all x, x_6 is an electrician. Therefore for all x, x_6 will not drink water.
forall x: P(x) -> ~Q(x). forall x: P(x) <-> R(x). forall x: Q(x). Therefore forall x: ~R(x).