The mainstream perception that conservatives are close-minded and dogmatic while liberals are open-minded and free-thinking has it almost exactly backward. Liberal dogma is settled: The government should do good, where it can, whenever it can. That is President Obama's idea of pragmatism and bipartisanship: He's open to all ideas, from either side of the aisle, about how best to expand government and get the state more involved in our lives.
Those who say they dislike dogma, or 'certainty', tend to be liars, hypocrites, or simply wrong. What they really dislike is the dogma of those they disagree with. A society that was certain, certain beyond all certainty, that putting its citizens in death camps was wrong, would never put people in death camps. Such things are only possible when you're open to new ideas.
There's nothing within science per se that says medical researchers must not experiment on human subjects; it is the imposition of ethical dogma that constrains the scientist.
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