Ok, fed up with being ignored here so I'll just get to my point with asking about Star Trek.
See Jabba, I'm a bit of a fan of the show in most of it's guises but my particular favorite was The Next Generation. This thread got me thinking about a specific episode in fact, which revolves around something that happened to the character William T Riker in his past.
As the episode goes the ship visits a planet Riker had been to previously while a Lieutenant, that had these powerful electrical storms sweep across it regularly. What happened on his previous visit was that a storm hit while he was about to beam up with the transporter (which locks onto your molecules, stores your DNA, breaks you down then reassembles you on the pad/destination, teleporting you almost instantly between places) meaning that for a moment his pattern was disrupted and he was nearly lost.
So anyway, the ship arrives on the planet and an away team (including Riker) beams down, only to find...another Will Riker! It transpires that when the storm hit, he was transported up to the ship, but was ALSO left behind. Two literally identical versions of himself, one on the planet, left alone because no one knew he was there, and one on his ship. This other Riker has all the memories, experiences and thoughts of the Riker who made it off planet up to the moment of the transporter malfunction, but their lives diverged from that point. Left behind Riker was still deeply in love with his girlfriend of the time, while show Riker had left her and moved on for instance.
Ok, so why am I discussing the plot to a sci-fi TV show? Because it follows the materialist model of the universe perfectly. Two copies of the same person, absolutely identical in every way, not just physically but mentally and emotionally at the point of duplication. Not one Riker looking out of two sets of eyes, in fact neither one knew the other even existed until the Enterprise went back to the planet, but two copies BOTH of whom were William T Riker, to the point where they have a row about which one is the real Riker until someone else points out they both are.
It's a great piece of TV, but more than that it shows how hollow your attempt to foist a soul onto materialism really is. Two identical copies of a person, both of them independent from the moment of duplication, but both absolutely and completely William Thomas Riker.
ETA: The episode was called
Second Chances