You have an attractor for "rube" and "blegg". If something is "really a blegg", that means that, once you know everything about it, you'd sort it as a blegg. You might currently sort it as "unknown", but since you would sort it as a blegg, it's really a blegg.

You also have an attractor for "person". You feel empathy for people. You care if they die. If you know everything about a human, they are sorted into "person". It's not really rational. They obviously have a name, and every name sorts them into "person", but somehow they only get sorted into there if you know what it is. Nonetheless, since everyone would get sorted into "person" if you knew enough about them, they're all people.

If Hitler personally knew the people he was killing, he wouldn't be okay with killing them.