+[TODO (working): rewrite this whole section to be more focused on _just_ explaining the math language needed to explain how the transformation mapping would work, using face and height as "easy" examples]
+
+I think I have just enough language to _start_ to talk about what it would mean. If sex isn't an atomic attribute, but rather a high-level statistical regularity such that people can be cleanly classified as "female" or "male" _in terms of_ lower-level traits (like hormone levels, genital shape, _&c._), then, abstractly, we're trying to take points from male distribution and map them onto the female distribution in a way that preserves as much structure as possible. My female analogue doesn't have a penis (because then she wouldn't be female), but she is going to speak American English like me and be [85% Ashkenazi like me](/images/ancestry_report.png), because language and autosomal genes don't have anything to do with sex.
+
+The subtle part as to do with traits that are meaningfully sexually dimorphic but not as a discrete dichotomy: we're _not_ satisfied with the transformation if the magical transformation technology swaps out my penis and testicles for a functioning female reproductive system but doesn't change the rest of my body.
+
+[...]
+
+I'm 5′11″ tall, which [puts me at](https://dqydj.com/height-percentile-calculator-for-men-and-women/) the 73rd percentile for men, about 6/10ths of a standard deviation above the mean. So _presumably_ we want to say that my female analogue is at the 73rd percentile for women, about 5′5½″.
+
+[...]