The concept of tacit knowing comes from scientist and philosopher Michael Polanyi. It is important to note that he wrote about a process (hence Tacit Knowing) and not a form of knowledge. However, his phrase has been taken up to name a form of knowledge that is apparently wholly or partly inexplicable. http://en.wikipedia.org/wiki/Tacit_knowledge
Tacit knowledge consists often of habits and culture that we do not recognize in ourselves
cannot be codified, but can only be transmitted via training or gained through personal experience (Master And Apprentices)
Here's a case of lost knowledge needing to be re-created: maybe engineering archaeology will always exist. The more I look around, the more the engineering world, once you go back more than a few years, looks like subterranean New York City. A mass of strange engineering feats humming away out of sight, produced by long-forgotten ancient peoples, leaving only fragmentary maps and diagrams.
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