I upvote if I think the discussion is or might get interesting, even if the link isn't. And this isn't meant as a criticism, but boolean judgments in general do

I upvote if I think the discussion is or might get interesting, even if the link isn't. And this isn't meant as a criticism, but boolean judgments in general don't seem to carry much data; when I read a submission, and I don't think I'm alone, I update a (lazily loaded) mental hash table with any new information on a particular key (or, less often, I add a new one). For efficiency I periodically cache this in hardware by reconfiguring neurons.