On Sat, Jun 27, 2015  meekerdb <[email protected]> wrote:

 ​>> ​
>> Conway's Life is computable but not predictable,
>
>
> ​> ​
> That raises a question as to what "predictable" means.
>

​If using the standard Game Of Life rules you could generate a new
generational pattern in N steps but I had some ​magic algorithm that could
do the same thing in less than N steps then the Game Of Life would be
predictable. But there is no such algorithm.

​The fastest way to know what it would do is to just run the Game Of Life
program and watch.​



> ​> ​
> In what sense is the evolution of Schrodinger's equation predictable?
>

​It doesn't matter because it described nothing observable, only the square
of ​the absolute value of
 Schrodinger's equation
​ is important, and even then it's only a probability not a certainty. ​



> ​> ​
>  the GoL is not reversible
>

​True, that's because for any given pattern there is usually more than one
parent pattern​

​that could have produced it.​


> ​>​
> if you watched a GoL running backwards it would include randomness.


​Yes, but a reverse Game Of Life is not computable.

  John K Clark​

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