That would be the fine art of being simultaneously meticulously polite and not at all nice, and is a subtle yet brutally effective way of tilting an audience in your favor completely independently of the soundness of your argument. Being good at reading someone well enough to figure out how to push their buttons without the audience noticing helps, as does having an opponent predisposed to being obnoxious/deranged/etc.

It's worth noting that professional creationists (and other intelligent people out promoting ideologies) tend to be very good at this, because it is effective, and acting angry/rude to them is a good way to "lose" an argument even when correct.