Its almost impossible to tell what they think since their brains operate on a different system than ours do. The wires just don't connect right. I had a funny text session with my sister-in-law earlier who is BPD like my ex. Just her usual irrational delusional nonsense, very entertaining but somehow annoying at the same time. She kept trying to suck me into her hysteria, and I kept shooting her down with common sense. She didn't understand the common sense part though. LOL
LOL
I've noticed that common sense doesn't work with my ex. She will not listen to reason. It's helped me to detach though. Just recognizing that her perspective on things is so distorted that it's impossible to ever work things out.