I went round in circles for a bit on twitter with someone about how I knew if I was a woman. She said to ask other women and see if I thought I was like them.
I said that the trouble was, that when I explained why I was asking, they universally responded that in that case, they didn't know if they were women either.
She said she didn't understand why I was explaining, that that was the problem - I should just ask 'Are you a woman' and take that answer.
Their whole system falls down if anyone is actually allowed to explain so people understand what is being said/asked basically.
No thought allowed. Just do as you're told and don't examine it.