anti-inductive situations: forum for week of 17 October

This example might be a little bit disturbing but it's the only one that I can come up with that's both simple and interesting. If I find a better and less disturbing example I will make another post/reply to this topic.

Most people would assume that all of the worlds animals have one head and therefore one brain. So on a graph, the data showing animals with less than one brain, one brain, and more than one brain, would show a straight line depicting that all animals have one brain. However there have been discoveries of certain animals with two heads. For example, two headed snakes, and two headed turtles. So these animals have two brains.

Well I guess this example is perfect for Halloween coming up, and perhaps an inspiration for someones Halloween costume?