How A Search Engine Determines Duplicate Content

I was browsing through the SEO Expert group on LinkedIn yesterday, and came across this excellent infographic posted by Jim Rudnick of  The graphic actually is credited to, and shows the steps of the process of how a search engine will determine the original source of the content.  The original source of the graphic can be found here.  You can also read about why Google cares about duplicate content.

how a search engine determines duplicate content