The key to this puzzle is tacit knowledge. To make stuff, you need to know how to make it, and this knowledge is, to a large extent, latent – not available in books, but stored in the brains of those who need to use it.
破解这一难题的关键是隐性知识。制造商品必须先掌握制造方法，而相关知识在很大程度上是隐性的——即人们在书本中找不到答案，答案都藏在使用者的头脑中。