[__MatrixMan__]

I'm not trying to nitpick, just trying to get my head around your original claim, which I'm tempted to amend:

> Black holes [above a certain mass] can't evaporate now because the cosmic background radiation is too hot

And that mass--the Stable-Black-Hole-In-A-Vacuum mass--it's decreasing. And whatever it is at a given time, more massive holes grow, and less massive holes shrink. Do I have that right?

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I'm trying to extrapolate backwards to a time when the universe was hotter and the SBHIAV mass was smaller. It seems like there ought to have been a point when the universe was so hot that holes expanded greedily, perhaps to the point where the expanding universe couldn't escape. Golly I wish they taught cosmology at my local university...