There are people without cerebellum. It affects thought and emotion.
https://www.npr.org/sections/health-shots/2015/03/16/3927897...
https://www.npr.org/sections/health-shots/2015/03/16/3927897...
Now I guess I'll have to tell 'em
That I got no cerebellum> He was born with a parasitic twin growing out of his back, which was incompletely formed and surgically removed