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					Originally Posted by HarryT  Absolutely. But that's what being a good scientist is all about. You come up with a theory, make predictions from it, and then perform experiments to see if those predictions are accurate. If they aren't, you revise your theory.
 I imagine it must be more difficult in fields like neuro-science. Experiments are probably less reproducable than those in fields like physics.
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 Even physics these days...particularly in the String Theory area.