Knowledge, as the result of human cognition, is a concept with a large extension  It generally includes 4 levels or aspects, namely common sense, general experience, scientific knowledge and philosophical knowledge  The so-called common sense mainly includes aphorisms, proverbs and other commonly known knowledge  It is often not an understanding of the nature and laws of things
Scientific knowledge is a theoretical system, which is logical and systematic
Compared with scientific knowledge, common sense has many aspects that cannot withstand scrutiny and it contains many errors.