I'm sure the whole gaming of HN has been talked to death. But it's not ever that clear to me as to what an 'upvote' actually is. In my mind a submission upvot

I'm sure the whole gaming of HN has been talked to death. But it's not ever that clear to me as to what an 'upvote' actually is. In my mind a submission upvote means 'Interesting', and with comments it's less clear. Does it mean 'I agree', 'Interesting angle' , or what