Mark, a friend with whom I walk in the morning, shared a "simple" puzzle from a book by Dan Kahneman's book, "Thinking, Fast and Slow".
Mr. Kahneman also notes how we tend to generalize from our experiences with the concept of "What you see is all there is" (WYSIATI). This method of making judgements provides an "illusion of validity", thus making it easy for us to develop broad generalizations from our limited experiences or information.
In a world where we are bombarded by information, this serves as a reminder to slow down in our decision making. It also challenges us to gather information from multiple sources, and allow time for the processing of information... that is at least if we hope to have a better chance of making a more accurate judgement.