Translate the following inference to logic notation: There is at least one x for which x_10 is not a politician. For all x, if x_10 were a sailor, then x_10 is a server. For all x, if x_10 were a server, then x_10 is a sailor. For all x, if x_10 were a politician, then x_10 is a sailor. For all x, if x_10 were a sailor, then x_10 is a politician. Therefore there is at least one x for which x_10 is not a server.
exists x: ~P(x). forall x: Q(x) -> R(x). forall x: R(x) -> Q(x). forall x: P(x) -> Q(x). forall x: Q(x) -> P(x). Therefore exists x: ~R(x).