1.)
Has there ever been anyone who were judged to be clinically dead by competent medical personnel in accordance with standard medical criteria, and later regained consciousness? Yes. Lots of people. Here's one study published in the leading British medical journal,
The Lancet http://www.zarqon.co.uk/Lancet.pdfAnd here's an interview with the guy who conducted it:
http://www.stnews.org/archives/2003/oct_feat.html#1Ok, that's one issue.
2.) Another issue is,
has anyone ever died and later given powerful evidence that they continued to exist in some form of conscious afterlife?
Well, the answer is yes.
I knew man called Bob, along with his wife Alice, and his two daughters Alison and Marion. I knew the family quite well because we attended the same Catholic church. Bob died in May 2003. I remain good friends with his widow Alice. Alison, the elder daughter got married in October 2004. Bob appeared to Alison is 'risen glory' while she was alone for a few moments in the bridal suite just before she was due to walk down the aisle with her mother and sister on either arm. It was an overwhelmingly joyous experience for Alison.
Does this
prove that Bob continues to exist in some form of conscious afterlife? No, it doesn't prove it. But given the remarkably powerful nature of the experience I wouldn't even understand what it would mean to say that Alison
has no evidence that her father continues to exist in some form of afterlife.
I lived in London, England for several years. I knew someone there, an older man and became somewhat friendly with him. One time I went over to his house for a cup of tea. We shared an interest in religion, and in the course of the conversation, he told me that he had once seen the risen Jesus, and explained to me further that though no verbal communication took place, in the course of the vision he knew that Jesus knew everything about him, knew that Jesus loved him with perfect, unconditional love. He found it a wonderfully joyous experience. Does this prove that Jesus rose from the dead and is alive now? No. But again, I think it's just silly to deny that this man had good evidence for the belief that Jesus did so.
I am a friend of a young man who is a gifted student of mathematics at UCLA, and of his father who is from Argentina, and is a retired physics professor with a Ph.D from CalTech. The young man spent the Christmas 2003 vacation in Argentina. On Sunday, December 23, 2003, he went by himself to the local Catholic church for Mass, but upon arriving found that he had made a mistake about the time for Mass, and saw from the schedule that he was one hour early. Rather than return to his father's property, he decided simply to wait in the church. He was looking at a statue of Jesus, when suddenly he realized that he should look towards the other side of the church, and when he did so he had a vision of Mary the mother of Jesus. The effects of the vision lasted for weeks, and included a continued sense of Mary's benign and loving presence. He told nobody of the vision until he returned to LA after the holidays, and the first person he told was me (and I don't know if he told anyone else subsequently). Does this prove that Mary the mother of Jesus continues to exist in some form of afterlife? No. But again, I think it's just silly to deny that this man had good evidence for the belief that Mary does.
I know two other people who have had similar experiences---a lady who is a professor of English at Cal State Long Beach who once had a vision of Mary, and a successful businessman who once had a non-visual but still remarkable experience of the presence of his deceased father which affected him deeply.
So that's just people I know personally who have strong evidence for their belief that persons continue to exist in some form of afterlife.
I have also read various spiritual autobiographies (Thomas Merton, Teresa of Avila, Ignatius of Loyola, Julian of Norwich, Catherine of Siena, Bernadette of Lourdes, etc) which record similar experiences as well as their transformative effects.
In fact, the biographical and autobiographical literature recording such experiences down through the ages and across cultural and religious divides is really rather extensive.
None of it absolutely
proves that there really are persons who have died and 'come back' in the sense of communicating with the living. But clearly there occurs a set of phenomena in the experience of many people of sound mind and good will which
strongly suggests that there are persons who do 'come back' from the dead; and, at least for the people who are recipients of these experiences, they constitute as good a quality of evidence for this belief as that supporting any other belief they hold, so powerful is the nature of what they experience.