If you think about it...gaslighting is using means to change another's idea or perspective toward a thing of subject. So essentially using your ideas to change someone else's reality.
The crazy part is...this could apply to everything and everyone. We take in information and then we apply it to our lives. And then people begin to look for validation. Most often this could be natural, but how many cases of validation come through gaslighting.
I mean...think about it. We either know things from personal experience of because someone else told us. If it was beings of someone else then it was their words shaping your ideas. If it was your personal experience then it would more likely be measured from someone else's, resulting in their experience and idea shaping your own.
Music: Another time
Musician: LiQWYD