Hi there i have alot of training in palliative care and i know you are scared ,have you just asked your dad what he wants.Sometimes the patient goes with what everyone says because it's easier,and alot of times they feel like they have no say over thier own lives.Sometimes we want to protect them but the best gift you can give someone is freedom of choice.He may or may not want chemo all we can do is support their decision even if that isn't the choice we would have made for ourselves.