The Mandela effect is likely caused by people mis-rembering things or just generally being mistaken about their memory. Even the most common Berenstain/Bernstein example comes from simple confusion. Best article i could find with pictures. https://www.cracked.com/article_34881_sorry-but-there-is-no-berenstain-bears-parallel-universe.html You were probably so into the song the first time you heard it it was over before you realized it.
ravheim
I'm of the belief that separating out rights into different groups allows societies or governments a way to weasel out of protecting certain groups because it's not socially or politically advantageous. Reading through the information on positive or negative rights, it seems that's a pretty common concern. Also looks as if that's the entire point since it stems from legal philosophy. Bodily autonomy of the mother is an absolute right. Abortion is an absolute right. Only a woman and her doctor should be involved in medical decisions.
The biggest issue with the EPA setting limits is finding labs that can measure to those levels with any sort of accuracy or precision. In the article they mention California's limits are 5 parts per trillion. That's 10^-12 or 0.000000000005. It's really hard to find equipment that can measure that low with out some dilution factors. This makes it hard to set standards. If you can't measure it, you can't regulate it.
It's a heritage of hate.