Re:the real flaw (Score 1)

First of all, there was no physical replica. Most of the third act takes place inside David's brain, as evidenced by the overexposed look of the film. But even if there were, it's a long way from that to creating a simulation of a personality.

If they can manipulate the boy's mind enough to create the illusion of a mother for a day, why can't they also manipulate it to delete the memories of the day before? He could live forever and have infinite first days, with no chance to suspect.

Stories about computers and artificial intelligence are boring, not even worth listening to. Stories about the human condition can be entertaining, enlightening, perplexing, and so on. You shouldn't be too surprised, I think.

Who said anything about computers? I was talking about minds, how they work, and our theories about them and their consequences. If you don't find this subject fascinating that's fine; I certainly do. Also, to find out how to deal with deep philosophical and scientific issues with no "human plight" angle in narratively compelling manners, might I suggest Lem? You mentioned liking Solaris: what do you think that's about?