Translate the following inference to logic notation: For all x, x_10 is a nurse 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 a taxi driver, then x_10 is a nurse. Therefore for all x, if x_10 were a nurse, then x_10 is a taxi driver.
forall x: P(x) <-> Q(x). forall x: P(x) -> Q(x). forall x: Q(x) -> P(x). Therefore forall x: P(x) -> Q(x).