On Tue, Feb 28, 2012 at 2:23 PM, Stephen P. King <stephe...@charter.net> wrote:
> On 2/28/2012 10:46 AM, Terren Suydam wrote:
>> On Tue, Feb 28, 2012 at 5:47 AM, Bruno Marchal<marc...@ulb.ac.be>  wrote:
>>> When we are dreaming we are in a higher level relative
>>> emulation (all UMs can do that).
>> That's confusing. I find it hard to believe a bacteria can dream. The
>> UM implemented by a bacteria could *potentially* run any program, but
>> it is *actually* running the bacteria program. To suggest that
>> bacteria (e.g. one of the class of "all UMs") can dream by virtue of
>> being definable as a UM generates more confusion than clarity.
>> Put another way, if a particularly instantiated UM possesses the
>> ability to dream (to imagine), then that says something non-trivial
>> about the constitution of that UM's cognitive architecture.
>> Terren
> Hi Terren,
>    If a bacterium is a physical system capable of implementing a universal
> Turing machine aka the particular bacteria's program, then Bruno's argument
> shows that it will necessarily be able to dream, for what are dreams if not
> alternative TMs running on the same hardware via dovetailing?
> Onward!
> Stephen

Dreaming in the context of Bruno's remark means that the running of a
single program could result in alternate 1p realities being
constructed... not that multiple programs could be run in the UM. At
least, that's how I interpret it.

A bacteria is a universal machine in that it can potentially run any
program. However, bacteria as they appear to us run specific programs
(as selected by evolution). Their instantiation as such is a stable
measure relative to us - the shared 1p plural reality. Bacteria that
run programs capable of dreaming (as above), while possible, would
probably count as white rabbits.


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