"Neo reactionaries are evil racists" seems the most subjective, in that we are more confused about "evil" than "killing" or "intelligence". But as long as we taboo "evil", I don't see how it could possibly be a useless-for-prediction, impossible-to-falsify statement.

You'd have to taboo “racists” too though.

(And tabooing “evil” is an almost FAI-complete problem, anyway.)