Tell that to Richard Henry Lee. He outright accused Thomas Jefferson of plagiarism when he did the Declaration of Independence, and not only did TJ not deny it, he even implied that was its strongest reason for promoting its values. Don’t believe me? Here’s some sources:
*https://mises.org/library/real-jefferson
*https://www.libertarianism.org/publications/essays/excursions/was-thomas-jefferson-plagiarist
I would tell that to Lee.
As I remember it they were political rivals.
Also John Adams said much of the same thing when he was feeling ignored and not getting the proper credit for his role.
Again politics not academics!