Not to mention Delbruck's principle of limited sloppiness. I don't know the best single place to read about it, but reading around the top google results you ge

Not to mention Delbruck's principle of limited sloppiness. I don't know the best single place to read about it, but reading around the top google results you get the idea. https://www.google.com/search?q=delbruck%27s+principle+of+limited+sloppiness https://www.google.com/search?q=delbruck%27s+principle+of+li... The prototypical story is Fleming's nose dripping into a petri dish enabling the discovery of penicillin. If he was less sloppy that wouldn't have happened. But he was unsloppy enough that when something unexpected happened he paid attention and knew what it meant.