Chris points to the Eurosport article where Floyd says:

...If they suspend me for two or four years - a humiliation which I hope doesn't happen - it's over for me....I've never taken testosterone, I would have been stupid to because you just can't get away with it [in doping tests]...Even if I'm proved innocent, my reputation is ruined.

So, man to man (rhetorically speaking), tell me: If  you think he doped, then he's a bald faced liar, right? You'd have to be a pretty big liar to maintain, falsely, your complete innocence after all this time and exposure, right?

This poll has the advantage of not allowing gray. For the question "Did he do it?", you could equivocate all over the place about the measurements. But cut past all that... do you believe the guy or not?