Is it diet, healthcare, social structure, even climate - and which is the most important?
Genetics largely determine which women will still be fertile at 40 and which ones won't.
WSJ: More Doctors Broach Subject of Women's Age and Fertility
Strategy boils down to selecting which options to pursue and which options not to pursue.
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Obviously there is a correlation, but which is the cause and which is the result?
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Find out which are the best ballplayers and which are the best for the buck.
And which sports franchise is in a trickier spot these days than the Indianapolis Colts?
And which state has the highest percentage of people living below the poverty line?
We started the day choosing stories and which groups of people would report on each.
Best to let the social scientists figure out which is cause and which is effect.
Pay special attention to which aspects of society move quickly and which move slowly.
FORBES: Forecasting Amid Rapid Change: Paul Saffo On Cultivating Business Foresight
Geithner will have extraordinary power to determine which firms receive aid and which do not.
The participants were asked to say which they thought were cheap and which were expensive.
BBC: Cheap wine 'good as pricier bottles' - blind taste test
Then determine which ones should stay on the plate and which should fall off.
They may have certain inclinations which are powerful, and which may be difficult to control.
And which of the following brands would tell a friend or colleague to AVOID?
FORBES: Ads Help Drinkers See Heineken Light As 'Occasionally Perfect'
Which ones are safe to buy and which will punish you with capital losses?
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On what basis does he decide which laws are unconstitutional and which are not?
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Instead you get a muddled policy mess that is cumbersome, lumbering, and which satisfies no one.
Call it an astute cynicism about which euro countries are worth saving and which aren't.
How can we know which checks and balances are utterly necessary and which are dispensable?
Which breast cancer cause marketing campaigns are worthy of accolades and which fall short?
FORBES: 3 Tips for Navigating Pinktober and Corporate/Cause Partnerships
And which of Mr Osborne's many new policies will deliver the biggest savings to the government?
The dashboards help SMBs to identify which campaigns are working and which ones are not.
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Difficult decisions have yet to be made about which businesses fit together and which do not.
And which revenue streams would the potential customers of our business model prefer us to pursue?
But we can readily determine which prostate cancers need treatment and which do not.
WSJ: Are PSA Tests a Good Idea for Screening Men for Prostate Cancer?
It created an algorithm to understand which tweets skewed positive and which were negative.
CNN: How do you feel about Romney and Obama? Ask the 'Twindex'
One is that no one knows how many and which food products have them.
Gordon Liddy, and which nearly closed the border with Mexico for ten days in 1969.
Better reality, from which come the values that consumers affirm (and which brands used to claim).
FORBES: P&G's Social Media Orthodoxy Could Sink Its Innovation Progress
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