Since you cannot believe that multiple personality really exists, what is the use of reading the blog, Normal Novelists have-use-enjoy Multiple Personality?

If you, yourself, have never discovered unmistakable multiple personality in a person who, previously, had not even been suspected of having it, then you cannot really believe that multiple personality exists.

I know this about you, because that is the way I was before I, myself, discovered blatant multiple personality in people who had never been suspected of having it.

Fortunately, the more of this blog you read, the more you will come to understand what multiple personality looks like in the real world, with real people who have it, but who have never been suspected of having it.

And with this knowledge, you, yourself, will eventually discover it in someone. At first, it will amaze you, so that you will not entirely believe your own eyes, until at least the third time you find it. That was my experience.