Daily reminder that the original MWI of QM by Everett (https://www-tc.pbs.org/wgbh/nova/manyworlds/pdf/dissertation.pdf) is the one that makes the least assumptions and follows the Schrodinger equation to it's logical conclusion. Despite this it's had terrible PR by pop-sci and philosophers distorting and misinterpreting the message. I encourage everyone who dismissed this interpretation as ridiculous to read the original paper.

Quick rundown:

>All systems evolve according to the Schrodinger equation (or analogous relativistic equations)
>The Schrodinger equation is deterministic, nothing probabilistic about it. Therefore physics is deterministic.
>Your brain is a physical system that also evolves according to the Schrodinger equation
>There is no discrete "branching". Each of the components of a superposition is just as real as all the others. If we design an experiment to do so we can always recover interference effects exactly as predicted by the Schrodinger equation, showing that all the histories were always "there".
>There is no reason in principle this also would not apply to human brains. There is only technical issues in getting interference for large and complex systems due to the size of configuration space.
>The probabilities arise from solipsism. All of the superpositions of your brain are real and together they give an exact description of reality, but you can't experience different states of knowledge at the same time so only one of those states is (You).

If you have a problem with this then explain why we can have in principle a totally objective description of 7 billion people acting according to laws of psychology, biology, ect.. but at the same time you only identify as one of them. What's the probability you were born as yourself? This isn't a question that can't even be answered by deterministic law because it makes an indeterminable self-reference. QM is deterministic but also applies to us.