But it only takes one to upset the apple cart. Let's say Usain Bolt has had his bits snipped and tucked and is now 'Lily Bolt'. It's not likely, but what what do we do, turn a blind eye? Will the reassignment weaken Bolt in a way that is fair?. You can't say it doesn't matter and is too rare because Lily Bolt would likely be in the record books... as the fastest human, let alone woman. At the highest levels, where fractions of a second matter, it would seem to me to be consequential. I don't know the solution.