On Tuesday, March 10, 2020 at 6:04:19 AM UTC-5, Lawrence Crowell wrote:
>
> On Monday, March 9, 2020 at 11:54:15 PM UTC-5, Philip Thrift wrote:
>>
>>
>>
>> On Monday, March 9, 2020 at 7:52:00 PM UTC-5, Lawrence Crowell wrote:
>>>
>>>
>>> I will have to write more if possible. I am not sure that all of physics 
>>> is derived from Gödel’s theorem. I see is as more that from classical 
>>> to quantum mechanics there is a sort of forcing, to borrow from set theory, 
>>> to extend a model with undecidable propositions. Where this undecidable 
>>> matter enters in is with the problem of measurement and decoherence.
>>>
>>>  
>>>
>> There is nothing in any quantum mechanics theory that goes beyond a 
>> formulation in terms of a quantum Turing machine. 
>>
>> https://en.wikipedia.org/wiki/Quantum_Turing_machine
>>
>> Quantum Turing machines can be related to classical and probabilistic 
>> Turing machines in a framework based on transition matrices 
>> <https://en.wikipedia.org/wiki/Stochastic_matrix>. That is, a matrix can 
>> be specified whose product with the matrix representing a classical or 
>> probabilistic machine provides the quantum probability matrix representing 
>> the quantum machine. This was shown by Lance Fortnow 
>> <https://en.wikipedia.org/wiki/Lance_Fortnow>. [ 
>> https://arxiv.org/abs/quant-ph/0003035 ]
>>
>> Actually it can all be reduced to the SKIP calculus.
>>
>>
>> *SKIP: Probabilistic SKI combinator calculus* 
>> <https://poesophicalbits.blogspot.com/2013/06/skip-probabilistic-ski-combinator.html>
>>
>> Add to the *S*, *K*, and *I* combinators of the SKI combinator calculus 
>> <http://en.wikipedia.org/wiki/SKI_combinator_calculus> the *P*
>>  combinator:
>>
>> *S**xyz* = *xz*(*yz*)
>> *K**xy* = *x*
>> *I**x* = *x*
>> *P* = *K* or *KI* with equal probability (0.5)
>>
>> It follows that *P**xy* evaluates to *K**xy* or *KI**xy*, then to *x* or 
>> *I**y* = *y* with equal probability.
>>
>> There is nothing "uncomputable" in any of this.
>>
>> @philipthrift
>>
>
> Except predicting the outcome of any quantum measurement in a 
> deterministic manner.
>
> LC 
>



Hopelessly pursuing a theory for that is just *a religious fantasy* too 
many physicists believe in. It is a rabbit hole going to nowhere.

@philipthrift

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