< span > in the field of economics, Knight looks "enigmatic", mostly because his works are difficult to read: he knows every word, but he doesn't know what he is talking about together. However, it is an illusion. It is a side effect of the increasing specialization of economics since World War II - the cognitive illusion caused by the narrow knowledge. This article is from WeChat official account: < span > book review of Economic Observer (ID: eeebook < / span > < a > < span >), < / span > < span > Author: Fang Qin, original title:" can social science predict this unknown world: true and false Economics ", head image from: visual China < / span >