User blog comment:Supahbadmarine/Do Blanks/Pariahs have Emotions?/@comment-2093048-20120309050122

Don't even the soulless necrons have a little emotion even in their "soullessness", though? (since the latest codex) At least the ones that haven't been killed over and over again.

Maybe there's a biological component to emotions that's unconnected/unrelated to the warp.