"The view that he's a robot that doesn't fatigue is nonsense," Herr said. "The science is immature. We don't know very much, but what we do know says there's no overall advantage for Pistorius in a 400-meter race."
Sports ethicist and philosopher Ivo van Hilvoorde of Free University in Amsterdam said the South African athlete represents the shifting boundaries between able and disabled sport.
"We are used to thinking of disabled as less," Van Hilvoorde said, "but it could be the other way round. Oscar Pistorius is a nice example of this."
Follow Gerald Imray at: http://twitter.com/GeraldImrayAP