"Well, on my everyday life I use not theory, which is a branch of mathematics that has implications in algebra, topology, geometry, and then also some applications in studying, for example, how DNA is crumbled up inside the cell. What I use it for is tying my shoe. And so the usual way of tying your shoe, you know, you do a normal knot first and then you do this thing where you do this first loop, the other extreme goes around it, and then you pass it under, you pull the two kind of years you get, and that's your shoe. And this, however, takes a long time. And if you're a mathematician that has a lot of work to do, there's another way of getting the exact same final knot, but by a different process. One of the things not theory does is tell you which loops are similar to which other loops and which ones are exactly the same, even though you tie them in different ways. And this is what I do. I get the exact same end product, but I tie it in a much quicker way. You do the two years as before, and now the only thing you need to do is pass each one under the other one and you pull, and you get the exact same knot in a third of the time, which at the end of your life will have probably saved you like five minutes."