I have been involved is several séances, Ouija board sessions, Coven meetings and other attempts to contact the other side. I cannot say that I noted anything too remarkable. However, having spent a number of years working in a neurological surgery unit in a large teaching hospital I will tell you that we do not truly have a clue how the brain works. I have seen people continue to perform functions after the portion of their brain that was believed to control that function was gone.
Because of that I would never go so far as to say that “life” after death is not possible. I would, nevertheless, be willing to assert that such phenomena would have to follow natural laws. These would be laws that we do not at this time understand of course. But I do not believe that anything is supernatural. My central believe is that nothing is above the law.