Here is a card with the four statements that you see, and no others. Assume that each statement on the card is either true or false; then find and identify each false statement. (Refer to them as a, b, c, d if you want, to speed things up.)
The statements are all mutually contradictory; it is not possible that more than one could be true.
They could all be false, or the first could be true and the others false.