They claim that by having the power to show its own results upfront, Google might have an unfair competitive advantage over other players.

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There is certainly an appetite in the US to talk about China's approach, which is seen as giving Chinese business an unfair competitive advantage.

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By instituting such charges banks can effectively exceed the limits intended by the law, increasing their revenues, gaining an unfair competitive advantage and creating consumer confusion.

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However, a leading House Republican, Rep. Eric Cantor of Virginia, said Tuesday that a government-funded health insurance program would have an unfair competitive advantage over private insurers.

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Of course prosthetics can be designed that would give unfair advantage in competitive sport: attaching wheels, for example, but down the line Herr believes motorized bionic legs will be used in sport and should be allowed, once they are sufficiently advanced to replace the Ossur Cheetah carbon fiber blades that are now the standard choice in Paralympic running.

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