LogFAQs > #913788219

But when you're arguing about legality you have to remove the statistical anomalies. All the instances where it isn't clear cut are less than 1% (much less often) than the total population and can be considered on a case by case basis because of how few there are.

It's not 100%, sure, but it's still clear cut that biologically speaking it's safe to say the average person will be born male or female barring a rare anomaly.