In this case I don't think my grandparents wanted
to believe they were dead
My Dad meanwhile, although he didn't believe in existence after death, did at least listen to what I said about the "post mortality experience"
He also had a very good memory so was able to work out what had happened and reorient himself appropriately. This is why he felt he had to to a course on 'things to do now you're dead'.
On another note I just finished an article on pendulum dowsing and one of the 'related links' at the bottom is my article on How to contact 'The Other Side' safely
which may be pertinent to this thread too