And can it recognize a double negative, as in, "all of these Apple sucks sites suck"? If you can do decent sentiment analysis though, you could lower the page

And can it recognize a double negative, as in, "all of these Apple sucks sites suck"? If you can do decent sentiment analysis though, you could lower the page rank granted by a link by sentiment of text in its proximity, while not lowering the rank of the page that contains the negative sentiment.