Whether it constitutes plagiarism should be judged by combining subjective motivation and objective results: subjective intentional or unintentional, and whether there is a fraudulent component; objectively, whether you profit from it, or whether it harms the original author prematurely. When people follow this The standard once again looked at the "practice" of plagiarism from ancient times to the present. What kind of behavior should be condemned by public opinion is gradually becoming clear. For example, in the field of literary creation, as early as the 17th century, Shakespeare was once trapped in the "plagiarism gate". Many sentences are similar to the works of previous generations. The vast majority of people acquiesced to Shakespeare's "plagiarism", and even unswervingly regarded it as a literary master. This is because in his time, such reference was conducive to dissemination. Knowledge benefits the public without causing substantial harm or negligible harm to the original author. The following statements are in line with the author's point of view:. ['Sentence similarity is an important criterion for determining whether it is plagiarism.', '"Learning" for disseminating knowledge will be endorsed by readers.', 'Limitations of the times prevent plagiarism from being clearly defined.', 'Plagiarism that causes substantial harm to the original author can be condemned in certain times.']