Implicit in such commonsense judgments lurks an understanding of the causal connections between various processes in the world, the likelihood of different outcomes, and the vested interests, or lack thereof, of those whose testimony we are considering. What would a professional news anchor stand to gain from lying about a fire in Colorado ? We need not go into the details here; if the anchor on the evening news says that there is a fire in Colorado and then shows us images of burning trees, we can be reasonably sure that there really is a fire in Colorado.