What is an acceptable similarity report?
There is a very distinct difference between what Turnitin flags as matching text (aka: similarity index) and plagiarism. There is no defined percentage match that indicates that your work is, or is not, plagiarized. A match of 40% may be perfectly acceptable, so long as your work is presented and referenced correctly.
What is a bad Turnitin similarity score?
While the exact bad score varies with different universities, anything beyond 49 is generally considered unacceptable since it shows that you copied too much from the internet or other sources. The Turnitin score tells how much you have copied. If you have a report you deem as bad, you need to remove the plagiarism.
Does Turnitin detect citations?
Reality: The similarity score is just a percentage of material in the paper that matches sources in the Turnitin databases. Text that is quoted and cited may appear as a match in the Similarity Report if quotes have not been excluded from the report; this offers a great opportunity to check for proper citation.
Does TurnItIn remember past essays?
TurnItIn has a policy to keep the paper in its archives. So, your paper is most likely to be still available in their archives. I don’t think a paper can be rewritten because the same topic (inasmuch as research is concerned) is less likely to be given to the same student.