it cannot be memorized and then routinely applied. Like other complex forms of expertise, such as a mature political judgment or a refined aesthetic sense, it must be earned through trial-and-error experience by each individual, generation after generation.

Fast skills typically have more explicit rule sets. Faster skills tend to be things where you can make a list of the right answers. Slower skills tend to be things that have more tacit rule sets—it’s hard to say what “right” is, but you might know it when you see it. So, for example, table setting is pretty explicit—you could explain what the rules

“Yego’s rise was enabled by YouTube. Yet since its founding, popular consensus has been that the video service is making people dumber. Indeed, modern video media may shorten attention spans and distract from longer-form means of communication, such as written articles or books. But critically overlooked is its unlocking a form of mass-scale tacit