Modern education is a typical effort that people are trying to make a product line of high-quality mind asset.
Without explicit, formal presentation of mind asset, we cannot efficiently connect and compose varied mind asset and we cannot well measure the value of mind asset. The issue of mind aggregation is particularly critical because individual mind is often too shallow to be high quality.
There is a natural gap between the presented value of the mind asset in the book and the real value of the mind asset in real world. This gap of knowledge understanding is a typical difficulty of mind asset measurement.
Because of the Web, the first time in history human mind becomes a critical circulating asset in society that ordinary people can buy, sell, produce, and share.