Imagine going to a fast food shop to order a pizza. The Italian cashier says they don't have pizzas. You can clearly see bunch of pizzas displayed next to him,

Imagine going to a fast food shop to order a pizza. The Italian cashier says they don't have pizzas. You can clearly see bunch of pizzas displayed next to him, with price tags and everything. What's the problem then? Well, according to the Italian cashier, this is not really a pizza. It does not fit the definition of pizza they have in Italy. If you want to order it, you have to say "Give me that bread with meat and vegetables on top". If you go to another shop and say that, they will look you like you are mental. This is the problem. For every definition of woman I can give you, you can easily dispute with counter argument. So we get "something". Undefined, because every definition is flawed. We end up with an overcomplicated system because we want to be accurate. If you think woman is a woman and pizza is a pizza - you are wrong. And we make so much fuss about it.