(For example,reduction may well be appropriate inillustration (a) if the Athlete clearlyestablishes that the cause of thepositive test was contamination in acommon multiple vitamin purchasedfrom a source with no connection to2.1 (presence of Prohibited Substance or itsMetabolites or Markers ) or Use of a ProhibitedSubstance or Prohibited Method under Article 2.2that he or she bears No Fault or Negligence for theviolation, the otherwise applicable period ofIneligibility shall be eliminated.