Black Emptiness

Poul Anderson's Time Patrolman, Manse Everard, assumes, as I do, that, when a world line ends, so does the person, i.e., when a body dies, its consciousness ends. I remember my consciousness going out like a candle flame when I was given a general anaesthetic and, on another occasion, when I lay down exhausted. If I had died under the anaethetic or in my sleep, then my consciousness would not have returned. Stieg Larsson's Lisbeth Salander, waking up very weak after an operation to remove a bullet from her brain, thinks:

"If death was the black emptiness from which she had just woken, then death was nothing to worry about."
-Stieg Larsson, The Girl Who Kicked The Hornet's Nest (London, 2009), Chapter 3, p. 61.

Poul Anderson assumes survival when he writes fantasy but this is only a fictional premise. However, if we assume, for the sake of argument, that each human being has an immortal soul, then we have to ask whether such souls are also possessed by:

Artificial Intelligences;
multiple "uploads" of human personalities (see here);
"emulated" human beings (see here);
tripartite Didonians (see here);
duplicated human beings (see here).

Can not only bodies but also souls be duplicated or would God create a new soul in each of these examples?