For example, I just up-voted James Andrix's and Kurige's comments about their religious beliefs.

I up-voted the comments because they're good data, I'm glad the commenters shared it, and it looks like stuff more eyes should look at within the thread. But I hesitated, because "up-voting" gives the appearance of agreement. Rating Kurige's comment "high quality" feels a bit similar, like calling it "high quality reasoning". But clicking up-arrow next to the question "Does this add to the conversation?" would feel obvious, to me in this case.