I think we agree on what we mean by discrimination in this context, but perhaps not what we mean by "rooted in facts". I think that not inviting blue people be

I think we agree on what we mean by discrimination in this context, but perhaps not what we mean by "rooted in facts". I think that not inviting blue people because you know that they are less likely to meet your criteria is "rooted in fact". We both agree that this is discrimination. Let me give an example where I think this kind of discrimination rooted in fact is acceptable. A company trying to hire a software engineer might only interview people with CS degrees. There is a factual basis that people with CS degrees are more likely to be qualified for the job, although there certainly are qualified people without degrees. Refusing to test those degree-less candidates is discrimination based on education.