[harry8]

Yep totally and I agree expertise in one field means nothing in another. But I'm also old enough to have listened to a theoretical physicist on NASA's issues including the space shuttle challenger disaster. His thoughts have become regularly cited across many domains. He most certainly was not a rocket engineer.

    "For a successful technology, reality must take precedence over public relations, for Nature cannot be fooled."

--Richard P. Feynman

[smegger001]

As I recall in that case he did a experiment to test his theory, (he chilled a sample of material the O-ring was made of and observered the result) and proved his hypothesis. The scientific method at work. You dont need to be a expert at everything when you have the resources to do adaquite research and experimentally test theories.