The more general meaning is "making a person question their own sense of reality", without any specification on who is causing it.
It may or may not apply here, it depends on if the person being argued against already knows the larger context of 80% being normal. Everyone around them pretending that was never the case would be gaslighting. If they didn't know the larger context, it wouldn't be gaslighting, they're just ignorant of the context.
It may or may not apply here, it depends on if the person being argued against already knows the larger context of 80% being normal. Everyone around them pretending that was never the case would be gaslighting. If they didn't know the larger context, it wouldn't be gaslighting, they're just ignorant of the context.