Generally speaking, if footnotes directly quote or paraphrase the contents of other documents, then these contents are likely to be detected by the duplicate checking system and may be calculated as the repetition rate. Therefore, these footnotes can be deleted during duplicate checking, so as not to affect the result of duplicate checking.
However, if footnotes are used to explain or explain documents or provide background information, they are usually not detected by the double-check system, so there is no need to delete footnotes.
In addition, if footnotes are used to mark citations or references, then these contents should not be deleted. Because these footnotes are very important parts of academic papers, they can help readers better understand and evaluate the credibility and academic value of the papers.
To sum up, whether footnotes need to be deleted depends on the specific situation when the paper is repeated. If the footnote content can be calculated as repetition rate, it can be deleted; If footnotes play an important role in explaining, explaining or providing background information for papers, they should be kept.