But the Europeans are right that the Taliban and al-Qaeda cannot be defeated only, or even mainly, by firepower.

ECONOMIST: A counter-insurgency in trouble

Quantitative easing, for instance, need not work only, or even mainly, through the exchange rate: early in the Fed's first bout of quantitative easing, the dollar rose.

ECONOMIST: Currency wars

Governments might spend money through charities not just, or even mainly, because they are better value for money, but because they work in ways that governments themselves cannot.

ECONOMIST: Charity and taxation

But, of course, that's not how we measure police efficiency because, if we are honest, we don't actually believe that crime, or the absence of it, is entirely or even mainly down to the police.

BBC: What do we value about the police?

Even the larger of the new areas serves mainly to hold one or two quests rather than a host of smaller ones, and so they feel linear even as the player is free to turn right or left.

FORBES: The Elder Scrolls 5: Skyrim - Dawnguard Review: An Expansion, but Not Expansive