How much debate is allowed in the general section?

I’m confused. The guidelines say we have to be on topic. I’ve had questions in general that the moderators have asked me to move to the social section even though there was no debate and little of what might be called chit-chat.

Yet there are questions, or at least one question at the moment, that have clearly crossed the line into debating.

I realize this is not a new question. I looked at the others, and I simply don’t understand. What’s permissible in the general section and what’s not?