What does ‘woman’ mean?

That’s what the UK Supreme Court is being asked to decide

Does a gender recognition certificate change a person’s “sex”? What’s meant by the terms “sex”, “man” and “woman” in the Equality Act 2010? Can people with full certificates recognising them as female complain under anti-discrimination law if they are not treated as women? And is the Scottish government’s guidance on these issues lawful?

Those are among …