I have seen several cases where groups of people are correct but are unable to explain why because they don't have perfect recollection of what they read, or where they read it. They just absorbed the correct position without the ability to fully and totally explain that position.

This often leads to situations where people will dogpile someone who takes the wrong position but not be capable of explaining why that position is wrong and why they should change it.

In some cases, people know the correct information and are just particularly poor at conveying it. Teaching is a skill and every single communist needs to hone that skill. Many are failing in this regard.

Depending on how long it has been since I engaged with a topic it can also be extremely difficult sometimes to recall exact details without spending significant time doing a memory refresher. For example Afghanistan and Xinjiang, I know the correct positions on this and I've thoroughly explained them well to people in the past but my ability to fully explain it weakens with time. I now rely simply on linking to resources because my own explanations get hazier and hazier with lack of time between engaging in the content myself.