Sort:  

I have no need whatsoever to check every post I read for plagiarism. Since I only vote what I actually read including each and every one of the comments in those posts. And therefore I would have realized instantly if such an author is or has been publishing plagiarized content for a long time and well in advance. };)

You hold the entirety of the internet in your knowledge base?

Nope, only in my good eidetic memory. :)