My PI is young and new to the university. She has been here three years without any publications. I did lab rotations and chose this lab because I enjoy working with my peers and my PI. However, I'm starting to have doubts about some of the choices made in designing my research topic that were made before I joined the lab as I've delved into the literature more. I've brought them up to my PI and she has dismissed them. The problem is my project is multi-disciplinary and part of the project is outside my mentors area of expertise. My project involves validating a novel model for a symptom of a disease that is supported by clinical research. However, my model is not actually representative of the chronic condition of the disease, and is just an acute insult that can lead to development of the disease in humans (likely with contribution from the many comorbidities). I'm not dismissing the possibility that it can still generate the symptoms we anticipate seeing, but my mentor refuses to acknowledge that this model is not actually a model for the disease. I'm worried that because of her inexperience, review committees will dismiss her grant proposals because she doesn't actually have a firm grasp of what she is talking about. She talks a good game, but I'm the one consuming all the literature on this topic and instead of trying to understand my concern she just states that it is the best representative model in a matter of fact tone. Also, I am not convinced that the preliminary data we've generated is showing some of the markers for the symptoms we are looking for, while my PI is absolutely convinced based on cherry picked representative images we've used for some internal poster presentations. She also has no idea what the best method for quantifying these symptoms is, and she is resistant to me suggesting changes to procedures. She also makes incorrect conclusions about what certain assays will actually tell us about the model, and, after the resistance I've encountered with bringing up concerns about the model initially, I'm hesitant to try and argue any further. Is this typical for a student mentor relationship with a young PI? Am I being overly worried? I don't know if muscling through the work will be a worthwhile investment of my time or beneficial for my career, and I'm starting to consider trying to find a new lab. Advice would be very much appreciated.