"noticing an error in one of the details of the assumption" - I don't quite get this. Like, it would be an error in the mental model, or there would be a detail / piece of data which didn't quite fit the model or something else? I'm not arguing anything here, I just can't quite understand what you are saying.

“I would start doubting if I noticed numerous important mistakes in the details my side’s data and my colleagues didn’t want to talk about it” . - I couldn't quite follow this. Could you give an example, or explain it a different way?