Twins same DNA but not same person
How can Jack 59 be him because they're clones? Identical twins share the same DNA but they aren't the same person.
sharethe Jacks aren't identical twins and maybe not exactly 'clones' (altho I don't really know what that means in a human sense, it hasn't been done).
The copies seem to retain some memories of the original Jack. The 'Army' jacks (not ever seen, just described) seem to me to have been 'deep wiped' where they likely couldn't function beyond their directives - to kill humans. Probably they killed until they were killed, eventually I imagine they would keel over due to not eating or drinking (or maybe they had a preprogrammed life span of only a few days).
The 'tech' Jacks were higher functioning, they retained speech and other higher order thinking capability, but the 'memory wipe' was somewhat faulty, there were original Jack memories that bubbled up occasionally (in dreams and even while awake after a while). This tendency caused the Jacks to start to rebel and not be an 'effecive team' with the Vikas (who had their own memories bubbling up, but apparently chose not to act on them).
the movie's ending/premise IMHO is that once the two Jacks saw ... what's her name ... Julia! their memories were 'cemented' and became more real remembered experiences. This 'metamorphosis' turned the copies/clones/whatever into a 'real' Jack ... basically a reincarnation. The final dialogue said something about love being carried on our memories (or shared memories could serve as a conduit for love, something like that). That love and the solidified memories are what made them reincarnations of the original Jack.
Jack's "soul" was poured into 49 and then 52 when this happened ...
I think this is why Julia accepted Jack 49 and then would also accept 52 as 'her' Jack, she could tell that his/their memories/love for her was 'real' and not faked or programmed.
It's a little 'out there' but I think it was done pretty well. It is Science Fiction after all, there's no explanation that has a basis in reality.
Nice explanation there. That's where the TET messed up with the tech Jack's, too much original memory.
Also as I stated in a different thread another screw up was using the snapshot Vika and Jack took together as a basis for their pairing together. Because there was no true love memory between them, when Jack met Julia it broke the illusion.