Gradebook has an option: Scale Min/Max Assignment Values in Total Grade. The Min often set to 50 to avoid giving a student a "nuclear F." At the spring 2023 conference, a customer asked for an override to be added. So, in most cases, with the option selected for the Gradebook, the Min as set would be in effect. But for a specific student/assignment/score, the minimum could be overridden so that a zero score (or some score below the Min) would be applied. The specific use case scenario mentioned was a student who plagiarized the assignment.