Hello everyone. I am using PMY Study Hall as one of my practice exam resources (the Udemy PMP practice exams and Pocket Prep are my other resource). When reviewing my missed questions, I am noticing that the correct answers and rationale PMI Study Hall gives do not always make sense. When that happens, I copy/paste the question and choices into ChatGPT, and it almost always agrees with my answer, and the rationale it provides seems more sound that Study Hall's. I am woried because I do not know if I need to course correct my answer or not. Has anyone else encountered this?

Hi everyone. I am working my way through the Udemy course and PMBOK Guide, and am just not comprehending the differences between Cost Plus Award Fee and Cost Plus Fixed Fee contracts, and Firm Fixed Price and Fixed Price contracts. Both Cost Plus types cover costs plus an award fee - how are they different? Similarly, both Firm Fixed Price and Firm Fixed are a set amount regardless of cost - how are they different? I think I am missing the nuance here, and appreciate any help from the group. Thanks!