OK, I found this interesting, all the way up to the “test”, which was the biggest pile of ridiculous I’ve seen in a while. Unless you had a really, really strong connection with Shakespeare, your Etch a Sketch or whatever else, then chances are you’re just totally guessing — and picking the most logical-sounding answer. “Goodnight, Gracie” is a funny, pun-type response so people would probably go “hmm, I suppose it was that”. Romeo and Juliet is most famous for the balcony scene, so people will just say the first ‘location’ that comes to mind. Etch-a-Sketch SEEMS more logical with hyphens.

If you want to test out how bad people’s memories actually are, just sit down and try to draw a dollar bill. Or check this — https://www.boredpanda.com/famous-brand-logos-drawn-from-memory/?utm_source=google&utm_medium=organic&utm_campaign=organic.

There’s another explanation for the Mandela effect — maybe he DID die in prison and was later replaced by a fake lookalike who seized power by riding on the former popularity of the real Mandela ;) — I’m mostly joking, but just because your memories don’t match up with what’s in history doesn’t mean you’ve moved to an alternative reality. History is often re-written and the media will start to report stories slightly differently over time — the only way to be sure is to keep a diary of major news events, perhaps.

But, generally, I would look into how human memory actually works, and go to any pub trivia night to find out how little most people really remember about history, geography and popular culture.