Hard boundaries are not required for categories to exist. It is really surprising that smart educated adults don't see this.

Will you suggest I'm sexist because I think male and female gender exists?

I make no claim to be smart and calling a high school diploma an education is a stretch. That said, human sex overwhelmingly clusters around two categories, albeit with some intersex outliers. Additionally, Bimodal sex has endured for as long as recorded history, so it appears to be an immutable trait insofar as the species is a stable species and not taking into account that somewhere along the timeline we share a lineage with single-celled organisms.

Race on the other hand, does not neatly cluster into discreet categories that any responsible person would define, draw boundaries around and count. Furthermore, race has not remained stable over recorded history. Populations mix, join and split. Which race were the Old Kingdom Egyptians? Our modern notions of Asian, Caucasian, etc. probably did not even exist during their era.

Using "Race" like this is really bad in Germany and Sweden. As is pointed out in this thread [1] how we use words differs. TIL race has a different meaning in English and Swedish. I use it in both but I've never thought about the difference in how I use it in different languages.

Categories are not fixed between cultures, even colours and numbers are hard to get right. So when you hear a word you can not be clear it is used in your broad meaning, or the narrow meaning.

This was actually my favourite way of nerd sniping back when I was young.

[1] https://news.ycombinator.com/item?id=48816222

Colors are a a continuous spectrum, yet we put them in a bunch of categories.

The genders have always been bi-modal, but the well has been poisoned by people calling it "a binary" (hence "non-binary" people). A sad state of affairs.

The implication of what you say — that white and black are races — is that indigenous Australians and African Americans are the same "race", because they both have black skin?

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