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We disagree about what is possible obviously, and while you are more straightford in your (in my opinion delusional)views than most the reality is that even though many women argue that gender is entirely socially constructed most don't really believe it when confronted with specifics. You do apparently, honest but delusional, although maybe not so delusional, after all; taking the position you do allows you to maintain intellectual consistency when you argue that all difference is constucted, and since men and women are different you will never be proved right but since no "acultural" humans will ever be available to study you can never be absolutely proven wrong either.