Translate the following inference to logic notation: For all x, if x_18 were an artist, then x_18 is a writer. For all x, if x_18 were a writer, then x_18 is an artist. For all x, x_18 is an artist. Therefore Linda is a writer or Mary is making tea.
forall x: P(x) -> Q(x). forall x: Q(x) -> P(x). forall x: P(x). Therefore Q(a) or p.