BA, I totally get that. My mom lived 3 months from the date of her diagnosis. She became increasingly more uncomfortable so we did our best to make sure she was comfortable. Like your Dad - she was grasping at straws to find a cure but there was nothing. We helped her with her decisions the best we could. In the end - we were grateful that we had enough time to prepare for the inevitable but not too much time for her to suffer.
I guess all I have to add is that you & your Mom could spend his final weeks desperately searching for the answer that is not there. Or you could spend it with him - reliving happy times, good memories with photos, videos etc.
Do what you have to do for your family right now. It is a really tough time & my heart goes out to you.
