Most political self-description is cheap. Ask people whether they value liberty and nearly all of them say yes. Ask whether they value social order, fairness, or national self-determination, and the yeses keep coming. None of it distinguishes anybody, because none of it costs anything to say.
Beliefs only become measurable at the point of conflict. A person who supports free expression and protection from harm holds two real commitments — right up until a case forces one to give way. Which one gives is the actual belief. Everything before that is a preference stated in the absence of a price.
This is why a good political beliefs test does not ask you to rate how much you care about things. It puts commitments in each other's way and records which survives. The pattern across many such moments is far more specific than any label you would have picked for yourself — and it is frequently not the label you would have picked.
