This must be a little like the pioneering days of steam or aviation: the earliest creations have passed the first credibility test and now the big powers of industry are getting interested.

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"The original explanation simply did not stand up to scrutiny, nor a test of credibility, " he said.

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The UK Border Agency would be able to "test the credibility of suspicious applicants" in future, he said.

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Any journalist familiar with the risk assessment protocols used by government agencies should have spotted the credibility gap between the test and the claim.

FORBES: Medialand

Clive Bates from Action on Smoking and Health said the government's backing of the Bill meant it had passed an "acid test of credibility".

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So what is at test here is the credibility of the United States of America and how we lead the world.

NPR: Transcript of Presidential Debate

For what's at stake is not simply a test of NATO's credibility -- what's at stake is the security of our allies, and the common security of the world.

WHITEHOUSE: President Obama on the Way Forward in Afghanistan and Pakistan | The White House

It will also, inescapably, be a test of his judgment and the credibility of any claim he might yet make to credentials as a "New Democrat" with responsible views on defense and foreign policy.

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Italy's Ansa news agency quoted Mr Frattini as saying the conflict was a test of Nato's "credibility" and that it was "clear that Italy must finish the job started with NATO and make a greater contribution if it is needed".

BBC: Barack Obama issues new Afghanistan military orders