Hi Pensive,
The plagiarism checker would highlight which part of your paper it had found to fall into its plagiarism hit-list. It accounted for common usage of English transitional verbiage and common use language. It would normally hit on mine due to names and theme.
I had written a thesis on the Potato Famine in Ireland which had happened in the late 19th century, as one example, and because I did not change the name of the towns of Ireland, and, my surname being one of the thousands displaced and relocated to the US (hence, the reason I chose to write upon the subject), I was tagged for some plagiarism due to the fact that I wrote about the Potato Famine of Ireland using names of actual sufferer's. As this had been written about before, there was absolutely NO WAY to not get dinged in the plagiarism checker.
It took 25% or better to have a paper turned-out due to plagiarism through the checker. As all of our papers also had to cite peer-reviewed papers, there was also some plagiarism in the quotations, though thoroughly cited, for which I used.
I have sent in an original work, "Blackberry Patch", which I hope to be posted soon. However, after I sent it in, I stumbled across "The Raspberry Patch" by Otto Dix. I have not read Dix's story yet, but, I would imagine that since both types of berry bushes have vicious cats-claw type thorns, there will be similarities between the two. However, I can not plagiarize what I have not read nor even knew existed.
That was the point I was trying to make. Certain works about a common style will, inherently, cross the lines of absolute plagiarism even though the two writings where completely unknown by either author.
Hope to clarify,
Dana -- EPL