The mystery of the tangling and untangling.

As a kid, I've always thought about why things get tangled up. To a kid, it's a very simple logic of if you tangle it in this way, why shouldn't the reverse process be as easy and straightforward?

As an adult, I finally realised (and I think statistics helped) that while there are so many thousand different possibilities and ways of tangling something, there can only be one way of untangling it - by going the exact reverse process.

And that is why things get tangled up so easily, but untangling it becomes so hard. 

To think in my teens I was proud of unveiling such a simple piece of logic!