As many CAS awards have stated, it is far more prudent to comply with the directions of a DCO and provide a sample in every case, even if provided "under protest". Subsequently, all manner of complaints and comments can be filed, rather than risk any chance of an asserted violation when an aspect of the doping control process becomes a concern. Staking an entire athletic career on being correct when the issue is complex and contentious is a huge and foolish gamble.