Content or pattern
Answer it in your head first, then look.
A couple have the same argument about money every few weeks. Last time it ended with one of them saying that the other is exactly like their father. What changed, the content or the pattern?
The pattern. The subject is still money. What moved is that the complaint stopped being about a decision and became a statement about the kind of person the other one is. That move is the one that does the damage, and it is invisible if you are only tracking what the argument was about.