Recursion in the “Real World”
For those of you who haven’t heard the term before, “recursion” is the idea that something is self-defining in mathematics and computer science (put in simple terms).
For example, the following definition is recursive:
- The father of a son is that son’s ancestor.
- The father of the son’s father is his ancestor.
On that vein of thinking, check out this picture I found on http://flickr.com/photos/lush/52805877/. As the author states, the sign is warning the escalator patron not to hit their head on the sign that is warning the escalator patron not to hit their head! It’s like some sort of lame Back to the Future paradox but in the real world.