Bernie's eyesore said:
They have a fair point. Gatlin has been banned twice and is now running faster than ever at the age of 32. Chambers has been banned once and has been nowhere near as good post ban as he was pre ban. Clearly though you feel the need to defend Gatlin though so it's easy where your loyalties lie when it comes to dopers.
I don't defending Gatlin (except insofar as he is the poster boy target of a hypocritical attack). I'm criticizing the inane thinking that negative tests mean someone's clean, except when that person was caught in the past. For that person, the very same tests apparently don't mean anything.
Gatlin is passing the tests. Either that's very difficult doped, in which case don't allow speculation he's doping as with other athletes, or that's not every difficult doped, in which case allow speculation they're doping for everyone passing them.