Turnitin's Similarity Report is NOT an assessment of whether a paper has or has not been plagiarized. Similarity Reports are simply a tool to help an instructor find sources that contain text similar to submitted papers. The decision to deem any work plagiarized must be made carefully, and only after in depth examination of both the submitted paper and suspect sources.
Please watch this mini tutorials from Turnitin to understand the OriginalityCheck technology and how to access and interpret Similarity Reports:
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