> On 29 Oct 2018, at 01:18, Tomas Pales <[email protected]> wrote:
> 
> 
> 
> On Monday, October 29, 2018 at 12:33:23 AM UTC+1, Brent wrote:
> 
>   There is no logical inconsistency in a flying pink elephant existing right 
> now in my den beside me. But don't see one.
> 
> First, it is not clear whether the existence of a flying pink elephant in 
> your den is consistent with the rest of this universe. Many things may seem 
> consistent while they are actually inconsistent. Before the 20th century it 
> seemed consistent with the laws of our universe that there was no speed limit 
> or that the energy of a particle could vary continuously. Now we know that 
> these phenomena are inconsistent in our universe and that's why they don't 
> exist here.

If it is dreamable, it is consistent.

Consistency is very cheap. Even the Auster arithmetical theories are all 
consistent with the assumption that they are inconsistent. <>t -> <>[]f  (if I 
am consistent, then it is consistent that I am inconsistent).

Bruno



> 
> Second, it might be that both the existence and the non-existence of a flying 
> pink elephant in your den are consistent with the rest of this universe. In 
> that case the elephant both exists and doesn't exist but in different 
> universes, because it would be inconsistent for it to both exist and not 
> exist in the same universe. And you happen to live in the universe where the 
> elephant doesn't exist. 
> 
> 
> 
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