Anchor: A guy flipped over upside down on a bicycle.
Entailed: A guy is riding a bicycle.
Contradiction: A guy flipped upside down in a car.
Contradiction: Alfred Marshall says to solves economic problems without any math.
Contradiction: Students in a lecture hall.
Contradiction: The resulting constant dollar value is different than what you would have expected if prices had stayed the same.
Contradiction: A man holds a book.