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Damn, I guess scientists can't be journalists or politicians.
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Scientists could be decent journalist, but unless they reach celebrity status, science pays a lot better. But you don't necessarily want a leader who is uncertain. We expect our politicians to have answers -- even if they are canned and insincere -- and to hold to them. When you see a politiician campaigning on a platform, "I can't wait to get to Washington and work for greater knowledge and understanding so we can find intelligent solutions to problems" I'll show you somebody who is going to lose big time to somebody who says "All we need to do to get the economy rolling is cut taxes and repeal Obamacare." Sadly enough, I'd have more trust in the loser, in this case, which is why I do politics on internet message boards rather than volunteering in campaigns or running for office myself.