Mathematicians will often spend days thinking of a clean argument that completely avoids numbers and strings of elementary deductions in favor of seeing why what they want to show follows easily from some very deep and general pattern that is already well-understood.

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If over time, more comes out about Qatar and its bid, Chuck Blazer and the rest of the United States Soccer Federation can now proudly say that they have a clean reputation, and are completely against corruption.

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Drain the rice and spread it out on a clean dish towel to drain until completely dry.

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You talk to the wind industry or the solar industry, if we hadn't passed the Recovery Act and all the support for clean energy, a lot of them would have completely gone under and we would have been ceding leadership as we already have, unfortunately, to a lot of countries like Spain and Germany and Japan that are doing a lot more work on it.

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But it too is something of a fiscal fudge, pilfering money from clean-ups of leaking fuel, tariffs and other improbable sources, without completely compensating for the shortfall in the highway fund.

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