Translate the following inference to logic notation: For all x, x_10 is a sailor if and only if x_10 is a taxi driver. For all x, if x_10 were a nurse, then x_10 is a taxi driver. For all x, if x_10 were poor, then x_10 is a sailor. For all x, if x_10 were a taxi driver, then x_10 is a nurse. For all x, x_10 is not a nurse. For all x, if x_10 were a sailor, then x_10 is poor. Therefore for all x, x_10 is not poor.
forall x: P(x) <-> Q(x). forall x: R(x) -> Q(x). forall x: S(x) -> P(x). forall x: Q(x) -> R(x). forall x: ~R(x). forall x: P(x) -> S(x). Therefore forall x: ~S(x).