That will be my new shorthand for people who change the subject when the argument is going against them. Look! A Squirrel! There is a guy over at Maggie's who is masterful at it, because he changes the subject by only 10-15 degrees, so you don't notice, and think you are still in the same argument you started with. He eats up a lot of energy of conservatives who could use their time better. Including me, sometimes. I try to be one refutation and out with him.
I will also seem to change the subject in the face of difficult information at times. Maybe it is more than seeming. Maybe I do much the same thing. Yet I do try to tie things back into the original topic with some explanation. When I notice it, anyway. Some people use that change of topic as an intentional tactic, and I think there is something dishonest about that. I suspect that the people who do it best do it naturally, though. When they just can't bear to even think a thing they've just been confronted with, their mind slides naturally to something more congenial they'd rather talk about.