Chapter 17 Section 6 How to evaluate the marketing theory in textbooks?

Some theories in textbooks are useful, but many are useless. For example, scientific theories must be correct in textbooks, but marketing, for example, has no standard and is difficult to verify. Those theories, especially in the early days, were all made up by some advertising companies. The degree of reputation and a lot of measurement indicators are all to deceive customers and manufacturers to pay more for advertising. I think this kind of thing is useless . It is still necessary to seek truth from facts, practice is the only criterion for testing the truth, even if you have to spend a little more time on your own, you still have to think about it, improve it, spend a little more time, try it out, and test it.

I think in this way, I would rather be slower, but reduce a little error.In terms of marketing, relying on textbooks is more risky.