But it would offer a way to make better raincoats, and is also a proof of principle.
These results are a proof of principle and a demonstration of huge potential.
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"This is an important proof of principle, " says Ronald Blum , director of the cancer center at Beth-Israel Cancer Center in New York.
Peter Harrison, the firm's chief executive, told BBC News that the demonstration did not focus on efficiency, but rather a proof of principle.
Karen Addington, chief executive of Juvenile Diabetes Research Foundation, who funded the research said the study provided "proof of principle" of an artificial pancreas.
Therefore, in order to establish proof of principle that they can hold ground over the long-term against the Tea Party, Democrats had to at least moderately erode the gains made by Republicans in 2010.
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At that stage Dr Pusztai's research simply looked like a proof of principle checking that the techniques for transplanting and testing lectin genes worked, prior to exploring other, less harmful lectins as built-in insecticides for crops.
Dr Lorenz Studer, head of the Stem Cell and Tumor Biology Laboratory at the centre, and the lead researcher on the study, told BBC News Online that the study was "proof of principle" that cloned embryonic stem cells could be reliably transformed into a variety of useful cell types.
If you're looking for proof of that principle, all you have to do is talk to today's orthopedic surgeons.
"If you can delay the onset by three, four, six, seven or 10 years, it's proof of the principle, " he said.
Although Yurke's tweezers are just a proof-of-principle, similar molecular motors might be used to assemble very tiny computer chips.
Such an experiment is somewhat ad hoc but should at least provide a proof-of-principle, according to Jim Tartaglia , global head of HIV research at Aventis.
By this principle, the burden of proof is on the advocates of any new technology that has the potential to cause harm to the environment of the public.
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