Yeah I got called a narcissist with my worst ex and then just flat out asked if they knew what it meant, I think it was a little telling they didn’t actually know (not that I do either lol). It’s really hard being with someone who makes you feel loved but doesn’t love you and I’m so proud of you for being on the other side of it and being happy!
They do something fun with this in the three body problem. It’s amazing and makes a ton of sense but in the real world the application will probably be a lot cleaner.