I'm sorry Peter, I have deleted your original message so I can't quote from
it. I think you said that "they" trust scientists to measure one part per
million but don't trust them to do something else. I just associated myself
(and perhaps even my "brigade") with the "they" that you were talking about.
I don't know what a EPA and FDA are so can't comment. I think that people
with high expectations are prone to being biased. Politicians are typical
of this group but they are perhaps more devious. There was quite a high
profile case about the honesty of scientists in Britain some years ago. I
can't remember the poor man's name but he was crucified for saying what he
thought about GM potatoes. Perhaps he was just a brave scientist - perhaps
naive - who knows.
Harry