http://images.google.com/imgres?imgurl=http://www.explodingdog.com/dumbpict51/ambiguity.jpg&imgrefurl=http://www.explodingdog.com/january1/ambiguity.html&h=600&w=600&sz=53&hl=en&start=1&tbnid=lZ0MT8IqwByY5M:&tbnh=135&tbnw=135&prev=/images%3Fq%3Dambiguity%

Best picture from http://explodingdog.com Ambiguities are all we have