On his first voyage west in 1492, Christopher Columbus knew that his crew felt uneasy about sailing into unknown waters for an unknown period of time. So he kept two logs for the journey. In the first, he recorded the distances traveled as he calculated them. In the second log, he deliberately entered shorter distances so his crew would think they were closer to home than they actually were.
This deception had an ironic twist, however. As it turns out, the phony mileage figures Columbus entered to soothe his nervous crew were more accurate than his “real” calculations. His “lies” had been closer to the mark than his “truth”!