Unfortunately, I have years of experience in doing (IT) business with psychopaths.
Based on this I’ve read lots of books about this topic and talked with other people in the same position.
I do think I have a rather clear understanding on how a “typical” psychopath behaves and acts. Acutally I do think most successful business people in upper positions are psychopaths.
So I’m not speaking casually but rather medically (of course I have no actual medical knowledge).