adjl posted... Where do shortbreads fall? By your description, I'm getting the sense that "biscuit" is roughly anything crunchier than a shortbread and "cookie" is anything chewier, but I realize that's a pretty baseless assumption.
You're right, it's about texture. Biscuits are hard. We consider American biscuits to be savory scones. The Wikipedia articles on shortbread and biscuit covers it:
https://en.m.wikipedia.org/wiki/Biscuithttps://en.m.wikipedia.org/wiki/ShortbreadShortbread is just shortbread. We'd consider it a biscuit, but usually just call it shortbread. I'm wondering if you mean something different, because I've never heard of the plural, "shortbreads".