trisher
So how do I tell an adult human female in every day life Rosie51? Do I need to carry some sort of test with me and demand a blood sample before someone passes? It's no good defining words by just using another group of words if that definition isn't any use in real life.
So actually you are saying that LRW would in everyday life use the same indicators of what is a woman as most of us. In other words his scientific knowledge is of comparitively little use. The idea that he would have greater perceptions is debatable. I could argue that someone who has studied life drawing would be more observant and have as much anatomical knowledge. It's irrelevant anyway. You simply cannot tell. You might get 99% right but the 1% you got wrong might be the person you describe as an adult human female- that's a woman !
The point, as I can't believe you haven't grasped, is that it matters in law.
If anyone is a woman because they say they are, then sex-based laws along with a definition of who is allowed into sex-based spaces, are meaningless.
You persist in bringing discussions down to whether you/we/anyone would look under people's clothes, or carry out a blood test (which would, incidentally, give proof and shows that sex differences are real, and that there is such a thing as an adult human female), or other invasive and intrusive means of determining sex, which is clearly an attempt to suggest that sex or gender differences are meaningless, but which entirely misses the point.
The point is that it really doesn't matter to most people, unless or until a male-bodied person wants to impose himself onto or into female spaces or by not declaring his maleness remove a woman's right to give informed consent to intimate touching. It also matters when someone who has benefited from male socialisation and positive discrimination declares himself as female in sex-based sociological research programmes and skews the results against women.
Nobody expects you to police anything. That would be foolish, and would massively over-step the boundaries of citizens' responsibilities. The point, however, is that these things do need to be policed, and the erosion of the idea of what a woman actually is is blurring the boundaries of the law, to the detriment of adult human females.