You assume that being brought up like a boy/girl (that is, boys toys/games vs girl's toys/games) would be the mechanism that determines our gender. Why should t

You assume that being brought up like a boy/girl (that is, boys toys/games vs girl's toys/games) would be the mechanism that determines our gender. Why should that be the case? The mechanism could be something different entirely (As with the ducklings who accept the first thing they see as their mother). Without that assumption, there is no contradiction in the "theory". Although it is also not a theory that can explain how people are made to feel like girls or boys. I don't think such a theory exists yet, or if it does, it has been silenced by political correctness.