And it's - at least the administration's response has been, administratively, it would be absolutely impossible to administer that and to monitor in each grocery store what people are buying with their food stamps and that they think a better approach is to just have this better education.

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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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Furthermore, it is, as argued by Alan Greenspan recently, absolutely impossible for the US to be forced to default on their debt.

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"Under-13s create a real problem because it is absolutely impossible in the current set of standards to be sure about the age of anyone because children will lie, " he said.

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Nevertheless, even in those earliest days, it is absolutely impossible to do it all and certain functions will need to be delegated.

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