On 22 Sep 2009, at 10:57, Flammarion wrote:

> On 18 Sep, 08:33, Bruno Marchal <marc...@ulb.ac.be> wrote:
>> I start from pure cognitive science. Saying "yes" to the doctor is  
>> not
>> pure math.
> Saying yes to the doctor does not show
> that i am being run on an immateial UD.

That is why I use a material UD up to step seven. This provides the  
main part of the "reversal".

> The existence of an immaterial UD needs
> to be argued separately.

No. The existence of the "immaterial UD" is a consequence of Church  
thesis. That such an immaterial UD is necessarily enough is argued  
separately in step 8 (MGA).



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