Whether a Jaffa Cake is a cake or biscuit has been an interesting debate for years. What this tells us about our language vs. our viewpoint and philosophy has been applied to gender identity in this interesting article. 

It's a great reminder not to be a slave to a label, or indeed the convention of a label. 

If you collect equal opportunity data of your workforce, do you just ask for 'gender' as male or female - or other options too?

It may be time to update your terminology to be truly inclusive.