The question is basically whether EII would be good at this in something like 60-70% of situations. That's a good baseline. And when looking at that breadth of situations...I'd be inclined to say EII would not be good at staying in the argument.
I think the explanation for EII's burst of standing firm seeming that way in an argument is because their standing firm like that is unusual and thus MEMORABLE. We remember the times EII stood up more than the times they sat down. That's my theory.