That means is not sure before taking decision and is under assumptions, because i think some people don't fall the victim of plagarism intensionally, except it's the person method of life is to mimic someone kind of research, i think the best is to pm the user base on the rank, and if happened to be old user it's very obvious that such Skip the memory and it deserve to corrected through private information or communication, so if the user refused to accept it's mistake within some hours, the function to report to the mod can be carried out without hesitation and that indicates intensionally Plagiarism instead of unintentional mistake.