RE: Cohen's Ecologic Studies

["Ted Rockwell" <tedrock@CPCUG.ORG>]

> A specific, credible example is cross-level bias and

confounding at the group level.



You're still talking generics!  You're telling us of things that could go

wrong.  Maybe he didn't account for the phase of the moon.



If "cross-level bias and confounding at the group level" can invalidate his

results, surely you can think of some numbers that would demonstrate it.

All that is required is that the numbers be credible--you don't have to show

that they are true.



Why can't you show us?  I can tell you how much excess reactivity, or how

much deficiency in shielding--in numbers--could invalidate a given reactor

design.  That is much more convincing that philosophizing about possible

generic problems.  If you can't think of any examples of how this might

actually work, can you blame some of us for questioning your arguments on

the basis of what kinds of generic limitations might create a problem.



Ted





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