[EricH]

Originally Posted by Chris is me

So a good general policy is if we don't know, don't state things as fact, which was my original point.

Correct, as far as it goes.

But in the case here in front of us, there is data, widely observed. It's just not quantified. Because it's not quantified, all we really have is what has been generally observed. We know, but we don't know exactly, therefore we generalize.