As noted in the Comment to Article 3.2, unlike the proof required to establish ananti-doping rule violation under Article 2.1, Use or Attempted Use may also be established by other reliable means such asadmissions by the Athlete, witness statements, documentary evidence, conclusions drawn from longitudinal profiling, including datacollected as part of the Athlete Biological Passport, or other analytical information which does not otherwise satisfy all therequirements to establish “Presence” of a Prohibited Substance under Article 2.1.