I am partial to the idea that the quantum state is a state of knowledge (about a system that we can only observe during the time slices in which we exist, and with uncertainty about our own state), but Nielsen opens an important discussion that is rarely make explicit.https://twitter.com/AndreasAtETH/status/1073455979919040512 …
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Replying to @Plinz
Do you have a problem with Deutsch's multiverse explanation?
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Replying to @davidarredondo
I don't understand Deutsch so far. The parts I understand seem obvious, but I still fail to get the point of the whole enterprise. I am sure it is my fault and it will click. (His perspective on QM is different than mine, but I am less qualified than him to have a perspective.)
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Replying to @Plinz
My guess is that the parts that sound obvious are primarily Popper and so nothing new to you. Same for Darwin/Dawkins/Turing.
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Replying to @davidarredondo
If I would describe my own perspective, it is basically a finitist version of the Church Turing thesis as the fundamental law, and you can derive physics by generating all universe states and recovering the universe that must contain us as a thread by following its memories.
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Replying to @Plinz
Ok. That makes more sense to me. Now how do we create more Knowledge?
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Replying to @davidarredondo
For foundational physics, we probably already know enough observable constraints to automate the exploration of the theory space. We should stop tinkering by hand, except for fun.
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Replying to @davidarredondo
evolution is like two lines of code, a general function that can explain increase in complexity but requires gluing a self replicator and a turing machine together, so the tm can take care of arbitrary state transitions; evolution needs to be understood as multilevel selection
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Replying to @Plinz
So why is a self (or observer) needed to say this? Or at all in physics or elsewhere. It just confuses good explanations.
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Self is a psychological/phenomenological entity. A model maintained by the mind that experiences a VR generated by the same mind. Physical observers are an artifact of describing the universe as separate interacting systems.
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