Even with the same reasoning, two diametrically opposite conclusions have been drawn.

There is a very famous example of dilemma reasoning in history. A school teaches people to go to court, saying that they should pay half the tuition first, and then pay the other half if they win the first lawsuit. As a result, a student refused to pay the other half of the tuition fee, and the school teacher sued him, claiming that if the school wins according to the judgment, the student should pay the tuition fee, and if the school loses according to the contract, the student should also pay the tuition fee.

However, the students said that if the students win the case according to the judgment, they don't have to pay the other half of the tuition fee. If the students lose the case according to the contract, they don't have to pay the other half of the tuition fee.

This is the dilemma reasoning, that is, the same truth has two different results.

You need a key to open the door, but you need a key to open the door. This dilemma is the result of dilemma reasoning.

The second is dialectics.

Hegel is the most typical representative of dialectics, and Marx absorbed the contents of Hegel's philosophy and inherited his dialectical relationship.

Dialectics simply means that things are divided into two, and the two are unified in opposites and transformed into each other.

For example, Hegel said that the father gave birth to a son, and the son also gave birth to a father.

("health" refers to ethics, not physiology) To understand your state, you must find a reference and make a comparison, just like finding a ruler to measure it. The ruler is just a reference, and the scale is artificially specified, not naturally existing, but if you want to know whether the ruler is long or short, you must have a standard.

So it's simple. If you want to test in your dream and find a standard, you will get the result.