Resurrecting from the dead is known as revival.
Throughout the river of history, many people have died, and strictly speaking, the resurrection of the dead only happened within the last two hundred years — unless your religious beliefs compel you to accept that someone rose from the dead in the year 33 A.D.
And even those who truly achieved this were few and far between.
Because very few people would convert all their memories into data. Some who did so might not upload them, and even if they did, there might not be anyone who would read them, let alone subject themselves to the brutal training with these memories.
