I'm having a hard time convincing my coach, who is anti-doping but always states that we shouldn't distrust all great performances. He also says that usually people use doping who aren't at the very top, because they wanna get there or have financial issues.
For example he thinks that El G, Radcliffe, Bekele etc are all legit. Is there any way I can prove him wrong and change his opinion? Apart from very few performances like the Chinese 3k or the women 400/800 he thinks that unless someone is caught with proof we can't claim that doping was used which seems retarded, considering that most doping cases only got discovered by house raids and tests are rather useless.