The question is whether you are operating from the right place.
I always think that "but but but ... because Lance" is one of the biggest signs of a failing argument. It's analogous to Godwin's law -- eventually someone will say "but I was fooled by Lance, so based on these credentials, you can trust me now to know the real truth."
That is partly why I say the WADA Code is broken, because it treats Shelby like Lance.
You really hope Shelby comes clean? What makes you think she was untruthful? The CAS didn't say that. The CAS did not because they cannot support such a conclusion from all of the facts and evidence. That suggestion only comes from fans without more facts who think they know better what the real truth is -- apparently on the basis that they were fooled before.
The CAS only found a failure to establish non-intent on the balance of probability. This was not a confirmation of the AIU's "near-zero" probability, but a finding of "less than 50%" likelihood that she proved the source with "specific and concrete elements". The problem with the AIU's "near-zero" argument is that people misunderstand what the "near-one" probabilty is. The "near-one" probability is that these pork eaters across the US test negative -- which doesn't apply to Houlihan's case. Some small "near-zero" fraction of those pork eaters who would test negative from pork, may test positive from another source. But most of them, with "near one" probability, will also test negative. By the same argument, testing positive for nandrolone, at those levels and isotopes, is also a "near-zero" probability event, as most athletes do not test positive for nandrolone, in that low amount, with a "pseudo-endogenous" isotope.
Researchers have known for decades that nandrolone -- of the small amount in question here, and with these pseudo-endogenous isotopes -- can come from pork. Prof. McGlone said that boars can slip past inspectors and into the market. WADA tells us that pork offal can produce values in the "low less than 10 ng/ml range", and occasionally much higher (as high as 130-160 ng/ml). WADA also tells us that the varying diets can produce a wide range of isotope values, making a GC/C/IRMS unusable for determining the endogenous/exogenous origin.
Houlihan's problem was two-fold: 1) "strict liability" means that, in an anti-doping process, there is no benefit of the doubt, and any uncertainty works against her bid to reduce or waive her sanction, and 2) many of the fans of the sport, including many who were fooled by Lance, don't understand that between certain guilt, and certain innocence, there is a group in the middle where the facts are lacking and cannot produce certainty. The WADA Code removes that ambiguity by pretending it doesn't exist.