Imagine walking along a path in a serene jungle. You come across a sign that tells you that you should turn around because there is danger lurking ahead. Further along the path, there is another sign that tells you that you really need to turn back. A third sign questions your ability to read signs and has pictures of dead people and a skull and crossbones, along with an arrow pointing itself around to indicate that you should turn around. The last sign just has a large X on it. If you haven’t stopped by the second or third sign, how is the fourth sign going to make much of a difference?