Why did the real Elliot manifest when Darlene was talking about Vera to him? Just watched the finale, and I didn't understand something. In episode 402, Darlene tells Elliot she talked to him before about Fernando Vera's return. Elliot doesn't remember it and neither does Mr. Robot. During the final scene, it is revealed there is "another one", which we now know is the real Elliot.

My question is, why does the real Elliot appears when Darlene was talking about Vera? I don't remember this being explained.

Btw this might be a dumb question.