ascensions - 3:14 pm on Apr 22, 2011 (gmt 0)
Just because you reword something doesn't lead to better quality... in fact it generally leads to less quality unless you're better educated than the author.
Duplicate content is part of language, even outside of the web. That's the reason we have fads, and idioms. Using duplicate content as a "quality" measure is irrational. You can take a single sentence and move a single word around to get multiple meanings. We all know, simply adding the word "FAIL" to a picture changes a "upsetting" picture into a "funny" one. Humans aren't binary, we're not spock, and Google's index appears to want to censor humanity's imperfections... which I can only think of one word for: FAIL.