Truth and Bull - sketch by douglas brent smith, 1989. Have you ever felt completely upside-down? "How do I know that you're telling the truth." "Because I always tell the truth." "Well, I know that's not true." "How do you know?" "Because it can't be true. How do I know that anything you say is true if I can't trust what you just said." "Because I am 100% truthful." "That's bull." "Or is it?" Feeling upside down, the conversation ended. Were they any closer to the truth? Likely, not. - dbS - Here's another version of the image with more saturation, allowing you to see some of what is on the back of the page, and adding more color: