The absolute limits of non-enhanced human athletic performance may well be set in stone.

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Indeed, Mr Straw's position may now be set in stone.

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The other phone showed at the launch event, the keyboard-equipped Q10, will come even later -- sometime in April, according to the company, although that doesn't seem to be set in stone.

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Barclays believes that copper mine production will be better in 2012, but cautions that nothing is set in stone.

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Administrator Hugo Mascie-Taylor said recommendations to downgrade some services were not "set in stone" and would be looked at again.

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Additionally our policies are not set in stone, we aim to continually be reviewed and revising our practices.

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First, since medicine advances too fast for any politician to keep up, the reformers will cast in stone a set of standards that will be out of date before they are even passed into law.

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This ensures that the new kilogram will be a truly universal and immutable standard, set in something much firmer than stone, or even platinum: the fundamental laws of nature.

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