I guess they also might had some math tricks that made it easy, tricks that you may now count as another &quot;art&quot; lost. But then would you try to rediscover some art about how some people dealt with something imperfect (because they had to) or you would rather look for something better that doesn&#x27;t require clever tricks in the first place? Now I come to think that (at least) some loses present opportunity value in themselves!