Life is often random. But not always so. Warren Buffett, day traders, and math PhD quantitative financial analysts have all made millions even billions by acting on the fact that not all variation is noise.
In an article published in Nature Magazine, researchers Evren Turner and Michael Brainard believe that errors made by high-performance athletes, musicians, and even CEOs vary not because of noise or uncontrolled variables but due to an attempt to learn and further improve performance by trial and error. To reach their conclusion they analyzed errors in adult bengalese finch birdsong, even that which was previously perfectly sung.
Here's my conclusion: perfection is a goal never reached perhaps because it is impossible to define.