But then again, one never knows the twists and turns that boxing can take.

WSJ: Bradley Wins Controversial Decision Over Pacquiao

One never knows when one will need that but one knows it will.

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When dealing with Simic science, one never knows whether the next experiment will turn out to be a shark frog or crocodile ooze.

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The general answer is no, although one never knows what can happen when a team is at the point of reckoning in making its decision.

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Louis Park Police Department in Minneapolis, Chief John Luce, says such a request makes sense because one never knows what's on the minds of the captors.

NPR: Waiting for News on Five Westerners Held in Iraq

Entry to the new Wizardland areas is voluntary, but one never knows if the code passed along from a friend or forum will lead to a relatively unguarded treasure trove or a floor fourteen death trap.

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But one never knows with the Yankees.

FORBES: Exit Jeremy Lin. Enter Ichiro Suzuki To New York City's Sports Market

One never knows, unless highlighted in a feature article in the Wall Street Journal as has happened in the past, whether or not he is getting margin calls at any given moment in time for a divorce or other cash needs like a new airplane or boat.

FORBES: Sprint's Hesse Underbidding For Clearwire, Still Hopes Shareholders Can Be Duped

But as Andrew Smithers, an independent financial analyst, points out, this policy is fraught with difficulty, because one never really knows how much money is enough.

ECONOMIST: The unstoppable, surging yen

No one knows how many folks pulled off this ruse, but it is safe to say that most were never caught.

CNN: An Overtaxed IRS