This is your merry-go-round, because you still think I'm arguing she is innocent, after all this time, rather than criticizing a process that can't tell the difference precisely because it allows drawing conclusions without evidence. Your X-files comment only highlights the depth of your ignorance. Prof. Ayotte has been studying nandrolone from pork ingestion for decades, for a reason, and nandrolone is not something added to pork, but occurs naturally in intact boars. Prof. McGlone conceded that intact boars slip through the cracks into the food supply despite USDA inspectors best efforts. This was never the fault of Mexican food vendors -- who I assume simply purchased USDA approved pork and pork products.
No, possibilities are not established facts, but just possibilities. With evidence they can become established facts.
"Intentional doping" is also a possibility, but not quite an established fact, lacking the evidence necessary to establish it. WADA got around that difficult evidentiary burden by allowing antidoping bodies to presume it, something the CAS was bound to respect.
These are not my possibilities. They exist with or without me.
Contrary to your serial self-deception, I can entertain the possibility that Houlihan is lying, and that she is guilty of intentional doping, in the real world sense. But without more evidence, it remains one of several possibilities.
I can also entertain the possibility that Prof. Ayotte lied, and that Prof. McGlone understated the impact of the pandemic.
When you discount meaningless possibilities, this necessarily includes Prof. Ayotte's suggestion of doping with an exogenous norsteroid precursor.
Presence is clearly not a basis for intent, because presence can be unintentional -- see Getzmann, and Lawson, and 27 USADA athletes -- and these are just the tips of the iceberg we know about. For these cases of potential unintended ingestion of small quantities of a banned substance, with questionable performance benefit, there is no basis to say "because the most likely cause of the presence of a banned drug in an athlete's system is the athlete themselves". This is another one of your many pure fantasies.