Pfizer had already enrolled thousands of adults in Trovan clinical trials but had not tested it yet on children, which posed a problem.

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Unlike Dr Anderson's method, however, the Strathclyde contraceptive has not yet been tested on people, only on rodents.

ECONOMIST: Contraception

The lead researcher Dr Ben Wheeler said loads of explanations had been suggested, although they had not yet been tested.

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In July, its leader Eamon Ryan said he was wary of quoted figures over oil resources which had not yet been tested.

BBC: Ireland 'close to oil billions'

However, treating patients with vitamin D has not yet been tested.

BBC: Sunshine vitamin 'may treat asthma'

In other words, an accurate, timely report of what was said should be legally fireproof - although that has not yet been tested in the courts.

BBC: Parliamentary privilege, MPs and super-injunctions

There is another question of political impartiality on which the commission has not yet been tested: the role of Mangosuthu Buthelezi and his Inkatha Freedom Party.

ECONOMIST: South Africa

Many survey participants experienced multiple crises over the past three years, which begs the question, How much more unprepared are companies that have not yet been tested in such crisis fires?

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As part of the FDA's domestic protein surveillance assignment, 63 samples of protein from Arizona, California, Connecticut, New Hampshire, Iowa and Minnesota have not tested positive for melamine yet, but 23 of those test results are pending.

CNN: FDA: Melamine-tainted poultry, fish safe for humans

However, unlike the banks being tested, insurers that fail the test will not yet be formally required to top up the capital they hold to absorb future losses.

BBC: Europe's insurers found to be 'robust'

To the men of the last type in their own success is a constant surprise, and its fruits the more delicious, yet to be tested cautiously with a haunting sense of doubt whether it is not all a dream.

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Although this theory has yet to be tested by a full-blown American recession, the subprime crisis has not had much impact on Asian growth so far.

ECONOMIST: Why emerging markets are flavour of the moment

We have reviewed or tested nearly every type of single-use hot cup on the market, but a viable alternative does not yet exist.

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