Thirty years ago, Mr Schmidt felt in his element as leader of the Social Democrats in parliament, just as Mr Scharping did in the same job until last autumn.

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Just 26% of advisers surveyed felt that "knowledge" was the most important element of customer service, compared with 47% of clients.

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"There's the kind of mythical or personal or historical element to thinking about the solar system that felt like a really fun idea, " Mr Dessner said.

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Have you ever felt frustrated with the fuzzy math that seems to rear its ugly head in nearly every element of biofuels environmental impact analyses?

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