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 can be inferred from the above.