I agree, but suggest the credibility the test is more questionable than Floyd's sanity. Why would he, in the midst (actually towards the end) of the race, while he was in the most prime position to win, take something that could be discovered and thereby jeopardize his victory. This doesn't make sense on several levels.
I am wondering if something he took for pain caused the physiology of his body to change and the testosterone with it. Given the "politics" of France and the situation against another American victory, I would not put anything out of the realm of possibility -- at least at this point.
Because he thought he might get away with it. That's why unethical people always do. They think they can get away with it.
This is a side issue, a quibble, but I have a problem with describing an above normal level of testosterone - a natural male hormone - as "doping." The word "doping" - to me - suggests drugs that primarily have an intoxicating effect, and which are not natural to the human body. Testosterone levels vary widely in males, and I have trouble with viewing an elevated level of this hormone as a sign of unethical behavior.