Translate the following inference to logic notation: For all x, if x_13 were an artist, then x_13 is climbing a mountain. For all x, if x_13 were a writer, then x_13 is climbing a mountain. For all x, x_13 is a writer or x_13 is an artist. Therefore John is climbing a mountain or Barbara is drinking water.
forall x: P(x) -> Q(x). forall x: R(x) -> Q(x). forall x: R(x) or P(x). Therefore Q(a) or p.