Interferance

 Interference is probably everywhere. There is constructive and destructive interference in physics. When  two waves meet it can either increase or decrease a wave (it should be easy to tell which one is which).  We have this in real life as well. When hydrogen and oxygen are mixed together they make water which makes them turn into something completely different. This could kind of be destructive interference. In real life when you make a pizza you mix good ingredients together to make something great. Together they make something that adds all of them to make something even better than when they were alone. This could be constructive interference.