Haha wow, I'd never heard of the Mandela Effect, and it's funny I hear about it now because just a couple of days ago I was seriously entertaining the idea that we all shift between slightly different alternate universes on a regular basis and it leaves small discrepancies in memories, but since we misremember stuff all the time and the differences are slight this phenomenon goes largely unnoticed.

This theory actually fits in easily with my theory of reality in general, that every possible physical state exists and individual consciousnesses just move through this multidimensional arena of states on specific trajectories chosen by them or by cause and effect given their thoughts, feelings and actions.. and that we each seem to have a reality shared by many other conscious beings who all experience the same past and future alongside us because those are the parallel versions of those other consciousness that all made the same choices that we did hence resulting in the same global timeline.. (i know that's not a fully coherent theory/description (yet??), like what's the relationship between the alternate physical states and the alternate versions of consciousness that make different choices...metaphysics is a hard thing to work out)

There's a house somewhere in my neighborhood that my mom could swear wasn't there for a while, I guess she figured they tore it down, then later it was there again. Then sometime later she happened to mention this to my sister Tori, and Tori said she noticed the same exact thing..

Another issue with the theory is that, if presumably memories are stored in the brain, why doesn't switching into another timeline also change the state of the brain's memories (along with the rest of that timelines history), hence making it so that nobody ever knows they switched? But I guess maybe not all of memory is brainstate, or maybe some of the brainstate remains the same when everything else shifts, due how close the brainstate is to the person's being.. i.e. maybe the mechanics of this timeline switching are "organic" and the lines are drawn in convenient/graceful places rather than things being more strict and absolute.