It may not be necessary to lay thousands of miles of new copper cables to tackle this problem.
It may not be necessary to stop using share options (though actual shares are probably a purer incentive and have shown themselves to be effective in motivating managers).
So, it may not be necessary to look any further than their place in the pecking order to explain what Dr Evans and Dr Schamberg have discovered in their research into the children of the poor.
So while the climatic phenomenon may make a pandemic more likely, they say, it is not sufficient on its own - and may not be necessary either.
The truth of the matter is that while such a strategy may be a necessary part of the success equation, it by itself will not be enough to maintain greatness once an organization has reached the top of their respective field.
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Mr Westerwelle's exit was surely necessary, but it may not be enough to restore his party's fortunes.
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AdverseEvents "is useful and necessary, but it may not be sufficient, given the problems with the FDA data, " say Joe Graedon, a pharmacologist who runs ThePeople'sPharmacy.com, a website where visitors often discuss their own experiences with drugs.
It is not farming, he reckons, because the algae themselves are never harvested (though it may be necessary to cull them if they become too abundant).
In industries that fall into the second category, foreign companies must not only localize their management, but it may also be necessary to partner with a strong local player.
Lastly, loose talk by the ruling Liberal Democratic Party about doubling the consumption (sales) tax, to 10%, has not helped fragile sentiment, however necessary it may eventually be to pay for Japan's pensions burden.
For the rest of us, learning precise chunks of information may not be necessary for our financial survival, but it can bring an unaccountable pleasure.
To do this, co-operation with others may be necessary, and we should not flinch from it - after all, we have spent decades opposing tribal politics and saying that parties should co-operate more.
The economy is struggling with a very severe housing downturn, and the global financial system is very unsettled, so the rate cuts may not do it, but they are necessary if we are going to be able to avoid one.
But one of the Science studies suggests that such "re-assortment" may not be necessary to give rise to a pandemic strain, and that it might emerge from mutations in H5N1 alone.
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