Not perfect, but leads will never be perfect.

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Statistical models of the spread of disease are never perfect, but they can help.

BBC: A scanner to detect terrorists

But you can never design a perfect protocol.

CNN: Cell phone made me a theater vigilante

But it's never quite perfect, is it?

NPR: Michael Urie Superb In Charming 'Buyer & Cellar'

This union may never be perfect, but generation after generation has shown that it can always be perfected.

NPR: Obama Forced to Address Relationship with Pastor

But we were never sent here to be perfect.

WHITEHOUSE: State of the Union 2013

"We know that enforcement is never going to be perfect, " but this measure should make it "much harder" for teens to get cigarettes, Farley said.

WSJ: NYC proposes raising age for cigarette purchases

In a perfect world, traders like to see tech lead, but the market never gives us exactly what we want.

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