As dean, Mr. Kagan championed hard sciences, rigorous hiring standards for faculty, and the protection of free speech.

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Rigorous, hard, fact based Cost-Benefit Analysis has to be applied if the EZ is not to create another cash drain.

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Heart patients who get standard treatment get better quickly, so it is hard to tell without doing a rigorous trial whether it was due to the new treatment or now.

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It boasts that in the last couple of years it has been working hard behind the scenes to impose a more coherent and rigorous approach on the various pay review bodies that cover most of the important public-sector workers.

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Although the idea of the uncanny valley has been observed, there has not been much rigorous scientific experimental work on it, partly because it's hard to get at the heart of the matter objectively.

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With this in mind, spa breaks and short out-of-town vacations are wonderful ways to reward the hard work that mothers undertake each day, while providing them with a break from the rigorous and strenuous routines of everyday life.

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