What does that have to do with this conversation? Agreeing on the meaning of words is necessary for basic discourse. It's not like distinguishing race and ethni

What does that have to do with this conversation? Agreeing on the meaning of words is necessary for basic discourse. It's not like distinguishing race and ethnicity is a redefinition during the course of conversation. If you don't accept the distinction of course you're going to be blind to dependent concepts. That's just a basic failure of communication.