The Foreign Key

I have only an extremely marginal understanding of relational databases. I remember being introduced to the concept of a foreign key, which basically controls all the values that reference it.

I understand foreign keys like this: If humans are the most intelligent species on the planet, then X, Y, Z.

What if elephants are smarter? The whole string falls apart. (Again, I may be butchering the true definition, but stay with me.)

So. White privilege is kind of a foreign key. I think the reason s...