At this point in life, there isn't any certainty of what is true and what isn't, at least for me. Maybe everything we've been told so far is a lie...
I find that interesting. "Maybe everything we've been told so far is a lie..." And who do we believe? The people claimed to be lying. Are the people making the claim? It's hard to determine when facts often can not be proven by the individual. Who do you believe? If you wanted to reteach people how would do something like that? You can't make them forget. Since we/you/I can't make people forget we would have to bring about doubt. Doubt in what they think they know. Doubt, in a time when everything is in question. Doubt is all it takes. Once doubt is established anything is possible. The imagination is the limit.