They speak of a "re-profiling" whereby Greece's private creditors might be persuaded to agree to an extension of the period over which they get their money back.

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Knowing this may influence the decision about whether the EU and IMF should require Greek bond holders to share in the pain with some form of debt restructuring, re-profiling or default.

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Criminologist Prof David Wilson of Birmingham City University, who once worked on the sex offender treatment programme at Grendon prison, says psychological profiling can indicate whether such a criminal is less likely to re-offend - but ultimately, the nature of the offence makes it impossible to be absolutely certain.

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