Other people in your dream, the brain tissue that produced that dream just lost the feeling of self, and then they couldn't contact other brain tissues and became an isolated piece, so schizophrenia was formed in your dream.
In short, your brain tissue is divided into two unrelated parts, one has a sense of self but can't solve problems, and the other is not self but can solve problems. Finally, the collision of these two ideas makes you feel that way.
This also shows that brain organizations are divided into different tasks, and each organization handles different tasks. Now, the division of labor has taken place and cooperation has not been formed.