A categorical statement makes it clear to the interlocutor that there is only one correct opinion - the author's. Another point of view is erroneous and of no interest. It is unlikely that in this way it will be possible to establish a constructive dialogue, and a categorical person will most likely lose his interlocutors.
Instructions
Step 1
Every time you want to convince another person of something, remember that you cannot be absolutely right always and in everything - at least because you are not omniscient. It is likely that your opponent has some information or life experience that you do not have.
Step 2
Ask him why he thinks so, and listen carefully to his objections. Do not rush to immediately debunk them - it is better to think carefully about your arguments. Perhaps your opponent will lead you to some new idea that will be useful to you.
Step 3
If the opponent really does not understand the topic, do not try to triumphantly prove to the audience his incompetence. Try to remain polite and friendly. If your goal is to attract others to your side, do not trample on a defeated opponent, on the contrary, show generosity. Compliment his curiosity, praise him for his desire to change the world for the better, etc.
Step 4
Eliminate phrases such as "nonsense", "nonsense", "stupidity" from your vocabulary, or at least never use them as arguments. If you tell your opponent that you think his point of view is stupid, then you make it clear that he must unconditionally agree with yours.
Step 5
Even if, after such a promising introduction, you list quite sound arguments in support of your innocence, it is unlikely that your opponent will hear you. Rather, he will, seething with indignation, figure out how to hurt you harder as a reciprocal courtesy.
Step 6
Replace emotional remarks that are unpleasant for your opponent with restrained and respectful phrases like: "I think …", "Of course, I can draw erroneous conclusions, but the facts are …", "Correct if I am mistaken, but it seems to me …"
Step 7
Remember often how often you had to make mistakes, and even defend your own delusions. This can be a good vaccine against categoricalness and will help to avoid unpleasant situations when your opponent will be able to prove that it was you who were stupid.
