Theory:Precognitive dreaming

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The following fan theories are about Precognitive dreaming.

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Theories

Theory	Citations	Notes
Angela's ability is not actually seeing the future, but "traveling" through dreaming. i.e. Time travel, Space travel, or Dream travel.	None.	+ When Peter met Charles Deveaux through dreaming, it's not the "future" but its the "past". - Peter may have used space-time manipulation in combination with precognitive dreaming. + In the Angels and Monsters episode, Arthur Petrelli can see Angela and touch her physically. - Arthur appears to have obtained telepathy, and likely use that to invade Angela's dream. + In the Eris Quod Sum episode, Angela talked to Gabriel through his dreams. - Arthur could have been pretending to be Angela in Gabriel's dream. - Angela's brain waves had visibly spiked on the machine when she used her ability. • According to BTE Week 6, Peter did use her power, but that doesn't mean it actually took him to the past.
Angela lost this ability when Arthur touched her in one of her dreams, which caused her coma.	None.	+ Angela had gone to coma, right after Arthur touched her. - In the Eris Quod Sum episode, Angela used her ability to communicate with Gabriel. + It might not have been Angela that appeared to Gabriel in his dream.
Precognitive dreaming is not a literal vision of the future, just a interpretive foreshadowing of what's to come.	None.	+ Peter did explode, but not the way he foresaw it. + All of the characters that appeared in the vision, were at Kirby Plaza. However, they weren't there in same manner as they were in Peter's vision (i.e. different actions, clothes, positions, etc.) + Nathan stood closest to Peter and was incinerated in the vision; in reality, he was closest to Peter, as he flew him away and he got horribly burned.
With experience, the user of this ability can see what will be and what could have been.	None.	+ Angela knew that Future Peter already changed his future to an alternate one. - She also said quite clearly "the only future I've seen is the one caused by your being here."
Gabriel was using the powers gained from Bridget Bailey (clairsentience) when Angela appeared to him in episode Eris Quod Sum and is a direct result of her taking corrective action on a precognitive dream.	None.	+ Angela always manages to be one step ahead of her enemies. + It explains why Angela fed Bridget Bailey to Gabriel in the first place: to prepare for a future she had foreseen. + Angela could have left that message weeks prior to Gabriel witnessed it and the company would have no reason to fear precognition or postcognition.