Finding the crux of a disagreement of this sort is non-trivial. Starting with explaining your beliefs and understanding in a more detailed way is a pretty reasonable place to start, IMO. Ideally, your conversational partner will stop you when they disagree, and expound on THEIR model in similar detail.
Interesting near-simultaneous post with https://www.lesswrong.com/posts/gNodQGNoPDjztasbh/lies-damn-lies-and-fabricated-options . In both cases, it’s about discussion with someone who has a different model, and there’s no real way to understand whether a semi-specified counterfactual world is “possible”.
Finding the crux of a disagreement of this sort is non-trivial. Starting with explaining your beliefs and understanding in a more detailed way is a pretty reasonable place to start, IMO. Ideally, your conversational partner will stop you when they disagree, and expound on THEIR model in similar detail.