On 20 September 2013 05:31, John Clark <johnkcl...@gmail.com> wrote:

> On Thu, Sep 19, 2013 at 10:18 AM, Bruno Marchal <marc...@ulb.ac.be> wrote:
>> >> A computation is a process.
>> > I can agree with this, unless you meant a "physical process", OK.
> As Rolf Landauer said "Computation is physical", all computations must use
> energy and generate heat. And what's the difference between a physical
> process and a non-physical process anyway?
> I thought it was only erasing the results of computations that had to use
energy and increase entropy? - if so - quibbling, I know, but sometimes
quibbles have important consequences.

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