The whole blue box thing in the codex is true, otherwise why would it even be in thecodex? It had to be tested and proved right.
Synthesis and the Reaper thing is pretty much space magic and the Mass Relays are half space magic I guess. The purpose of the Keepers is to maintain the Citadel and wait until the Reaper Vanguard sends them a signal telling them to open the Citadel relay, allowing the Reapers to start the harvest. Though the Protheans changed them and now they only live to maintain the Citadel.
The way you're speaking is like you believe the Geth and EDI are ''made'' of Reaper technology. They're not. Geth only have a Reaper code inside them. And EDI was only partly designed by Reaper tech. They don't have that much Reaper ''tech'' inside them.
I'm not saying EDI truly feels emotions. I said that it was her programming from Cerberus that allowed her to imitate those emotions. Looking at Shepard, the crew and the people on the Citadel is what helped her develop those organics feelings and behaviors, which she does not truly have but only imitate. I know she's not organic.
I'm saying the codex is "true" based on the information presented at the time. Would it be difficult to restore EDI and the Geth to their original states. Yes. Impossible? No, nothing is impossible. Especially in the Mass Effect Universe.
It's all space magic. That is one function of the keepers. What do they do behind the scenes that we don't see? This is the actual question I'm asking. We don't know. There is a lot that isn't explained, and much of it is intentional.
I'm stating reaper tech has significantly impacted what they are, and since it's space magic, I don't see why it wouldn't be possible to recover their "personalities." Also, if we discount the reaper modifications, Geth are just simple AI built on a Consensus and EDI is a simple AI built for Cyber warfare. Recreating and replicating their original functions would not be a tough task.
The keyword is programming. She was programmed to do everything she did. Her "free will" was limited by her programming and she could only alter so much within those parameters. That's my point. She lacks the complexity and intricacies that go with being an organic, and the same applies to the Geth. Yet to continue to rely on one short codex entry as reason enough to show it's "impossible."
The entire story of Mass Effect is impossible and especially what Shepard did lol. Why is it so improbable that an AI, with significantly less complexity than an organic, could not be restored? The truth is you don't really have an answer, and neither does anyone else. I'll be curious to see if BioWare further explains this going forward with the next Mass Effect.