There has been an official recognition of that in the case of Greece, with the decision to encourage its creditors to swap their Greek loans for bonds worth 21% less.

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To make a legal case against Winnick, prosecutors will have to show that he knew that the swap transactions lacked an economic basis and were used to paint a false picture of the company's financial situation.

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And the genes and proteins (especially the ones that scientists are keenest to swap) of bacteria and plants are very similar in any case.

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In 1969 the Matthews case and that of two other couples were bundled up with an East-West spy swap.

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