At least in principle, the window of detection and the drug's permanence in the body are distinct. It is possible that it could linger for years but fall below detectable levels. Mir says they told him the drug would be out of the body in at most a few months. But if the drug hasn't changed nor has Mir's metabolism, their saying it would be out of his body within months truly was inconsistent with what we're hearing about Jones. Now, if what changed was the sensitivity of the tests, this raises questions that should be addressed: obviously the residue detected in Mir was detectable with the test that existed at the time. What distinguishes that residue from the older residues that are only detectable with the new and improved test? If there really is such a difference, it should be easy to determine whether Jones' is doping or just pulsing: just give him the old test. If it comes back positive, you know he doped recently.