LizR wrote:
On 29 April 2015 at 05:35, John Clark <johnkcl...@gmail.com <mailto:johnkcl...@gmail.com>> wrote:On 28 Apr 2015, , Bruce Kellett wrote: > I must admit that I do not know what a computation that does not utilize a computing machine (physical) is. Show me one, and indicate how it works. On Tue, Apr 28, 2015 Bruno Marchal <marc...@ulb.ac.be <mailto:marc...@ulb.ac.be>> wrote:> This is explained in all textbook in computability theory.Hmm, I don't totally understand how this works but apparently there are so many examples of ways computations can be performed without using physical processes that Bruno is unable to give even one of those examples.> It is the kind of "well known fact" that I have been asked to not explain in my thesis, as it is known by undergraduate student I confess I did not know that "well known fact" and neither did anybody in Silicon Valley. What a shame companies like INTEL IBM and Apple have wasted trillions of dollars in building hardware when if they had just asked any undergraduate student they could have told them how to make a computer without using any matter or energy or momentum or spin or electrical charge or anything else that is physical. Bruno you really need to start your own company, you'll be able to sell Bruno brand computers far cheaper than your competition that still makes them out of old fashioned matter and still make a big profit. Unlike those other companies you don't have to build your computers in China, in fact you don't have to build them at all, so your manufacturing costs would be zero! And think of the convenience of a smartphone that isn't just thin but takes up no space at all in your pocket. I predict that just 6 months after your new company's IPO you'll be the world's first trillionaire.So because Bruno considers that 2+2=4 is true everywhere, at all times, in all universes,
Given the definitions of '2', '4', '+', and '=', '2+2=4' is a tautology. Everywhere and any time you define these things the same way, the same result is obtained. So just where is the calculation?
you think Bruno is saying that someone could build a physical calculator that doesn't use energy?
No. But he seems to think that he can have a non-physical calculator. Bruce
Would you like to run that logic by me again, or are you being deliberately obtuse for rhetorical effect?
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