I don't know what kind of time you have available in an average day, but I can tell you that I don't have the time to go research what every yahoo with an opinion has. I don't mind being wrong, but if I say something, I am saying it because I think I'm right. Just because someone disagrees with me doesn't make me think I should go spend the time trying to prove their position.
You're awake for sixteen hours a day and you can't spend five minutes looking up what somebody's talking about? Research nowadays doesn't take a long time.
It's not a matter of doing it "part-time". The original example given was that if somebody said "this way is better" and they had lots of upvotes, then it would be worth looking into. Thing is, that's a rare case in a conversation. Most talks here are opinionated, and opinions don't require research. In the off-chance that there is a comment that has, say, five responses suggesting alternative methods, then that's obviously a subject that warrants research on the part of the original commenter, if he cares at all about the subject.
