If one edits a photo, then hooks their iPhone up to a computer via USB, the user will see the original (e.g. 1234.jpg) as well as the edited version (e.g.
E1234.jpg). This leads me to believe that the original is still there, but iCloud doesn't allow the user access.
Pardon me if this seems like an absurd question, but why would Apple think it's users would have no interest in the original? More importantly, if they think the original is of so little importance to the user that it wouldn't be on iCloud, why does it remain on the iPhone - where space is needed?