While 'cruising' the Main river, I spotted a picture of what I thought was a duck on the roof of a building. Sam thought that it looked more like a rabbit. As it turned out, we were both right as this is a cartoon version of Ludwig Wittgenstein's duck-rabbit which illustrates the ambiguity of seeing.
In searching for related articles for this post, I stumbled across this website for Duckrabbit Digital Production and Training Company ( http://duckrabbit.info/) - have a look, they are good.
