But although a warm sea is a necessary condition for a hurricane, it is not a sufficient one.
But it is a sufficient condition: it happening will lead to a contracting economy.
Building capacities in Member States for Open Access is a necessary but not sufficient condition for promotion of OA. Creating an enabling policy environment in Member States for OA is therefore a priority.
That is a necessary but not a sufficient condition, as the type of rock involved, called carbonaceous chondrite, is found in other asteroids, too.
But rigour alone, unfortunately, is not a sufficient condition for it to be relevant and important in terms of its implications for the world of business.
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But sex appeal for the male athlete is neither a necessary nor sufficient condition for endorsement success.
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An increasing, growing, money supply is a necessary but not sufficient condition for there to be economic growth.
Yet, in some respects this effort is a necessary but not sufficient condition for creating thriving urban environments.
Good analysts are likely quite skilled at mathematical modeling, but it is a necessary and not sufficient condition for being a good analyst.
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Money is a necessary but not a sufficient condition for the good life, for happiness and wisdom.
Foote et.al (2009) argue that negative equity is merely a necessary but not a sufficient condition for default.
Apart from anything else, if the Fed's and the Bank of England's policies of keeping money cheaper than it has ever been hasn't returned the US and UK to better-than-anaemic growth in the past three years, it is questionable whether it will be a sufficient condition for proper recovery in the next two years.
Since pursuing your passion is a necessary -- but not sufficient -- condition for a great career, it becomes logically essential to find your passion as a starting point.
The arithmetic implies, as a necessary but not sufficient condition to spark EU growth (robust growth abroad is also needed), the euro should drop about 20% against the currencies of its trading partners.
Put it another way: domestic reform is a necessary condition for successful adjustment, but it's not sufficient.
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