In the event of a disagreement with my manager, I would start by making sure I completely grasp their viewpoint. I value their perspective, as they possess experience and knowledge that I might lack. If, after considering their perspective, I still have reservations, I would gather my points with supporting evidence and engage in a private, respectful conversation with them. I believe in having constructive discussions and viewing disagreements as chances for growth and better understanding. Ultimately, even if we don't see eye to eye, I would respect their final decision since they have a broader understanding of the organization's overall goals.