Oh I’ve read about this. There was some sort of longitudinal study about like abortion rights or gay rights or something, and people who had shitty views in the past legitimately could not remember that they used to believe that.
It’s all about protecting the ego, I think.
I think it was mentioned in this book https://www.davidmcraney.com/howmindschangehome
I think the people who need to have these rumors debunked wouldn’t trust a .gov website. They’ll believe a random fb post though.