Requiring all three criteriawould also be unsatisfactory.For example, the Use of genetictransfer technology to dramaticallyenhance sport performance shouldbe prohibited as contrary to the spiritof sport even if it is not harmful.Similarly, the potentially unhealthyabuse of certain substances withouttherapeutic justification based onthe mistaken belief they enhanceperformance is certainly contraryto the spirit of sport regardlessof whether the expectation ofperformance enhancement isrealistic.