My dad was this kind of know it all person with very strong opinions - just recently I've started to wonder if he was a narcissist. He reacted badly if someone disagreed with him. I got very good at looking like I was paying attention when really I'd gone to my happy place. Even so, I am really loyal to him too. But even now, all these years later, I have a really hard time disagreeing with someone even when they are obviously wrong, esp if they are male and loud, controlling, etc.