>>12025171It's an unscientific concept; you can't isolate confounding variables (e.g. literacy, language fluency) with anything being measured by a written or verbal test, since the confounding variables will influence the test score.
>>12027601>t can't into elementary logicGiven two true/false variables, we have 4 possibilities:
>true true>true false>false true>false falseLet x = "born with pp" and y = "born with vag." Let a configuration of x and y be a sex. Since
there are 4 such configurations, there are 4 possible sexes. QED
Bonus: people have been born with all possible configurations, so empirical investigation supports our theory.
