This () is so weird, bordering on perverse. Q is: given many details of their brain, how reliably can you predict someone's sex? Research shows it's between 80% () & 93% ( ) of the time.
Using a multivariate approach, this 2016 PNAS study found that they could accurately predict a brain’s sex 93-95% of the time. They conclude: “multivariate analyses of whole-brain patterns in brain morphometry can reliably discriminate sex.”
Patterns in the human brain mosaic discriminate males from females | PNAS