Hi Bruno

>> Yes, it is the common confusion between 1 and 3 views.

There is no such confusion. I haven't seen anyone confusing these.

>>She should have said: "whatever she knows she will see, she should expect 
>>(with certainty!) to see SOMETHING definite". 

But, If she had of said that you'd both be wrong! 

>> And in the 1p it is obvious she will never see both outcome".

You need to stop confusing what is seen with what can be expected to be seen. I 
think that's the source of many of your mistakes. She can expect to see each 
outcome without being committed to the view that either future self sees both. 
All that 1p,3p,3-1p,1-3p stuff is a rubbishy smoke screen to divert attention 
from the simple error you make here, isn't it?

All the best

Chris.

From: [email protected]
To: [email protected]
Subject: Re: 3-1 views (was: Re: Better Than the Chinese Room)
Date: Wed, 26 Feb 2014 05:26:02 +0100


On 25 Feb 2014, at 07:31, Quentin Anciaux wrote:Greaves rejects subjective 
uncertainty. With respect to spin up and spin down pay special attention to the 
point in section 4.1 where, in discussion of a thought experiment formally 
identical to Bruno's step 3, he argues:

"What ... should Alice expect to see? Here I invoke the following premise: 
whatever she knows she will see, she should expect (with certainty!) to see. 
So, she should (with certainty) expect to see spin-up, and she should (with 
certainty) expect to see spin-down."
That's nonsense, and contrary to observed fact. 

Yes, it is the common confusion between 1 and 3 views. She should have said:

 "whatever she knows she will see, she should expect (with certainty!) to see 
SOMETHING definite". And in the 1p it is obvious she will never see both 
outcome".
Bruno
 http://iridia.ulb.ac.be/~marchal/ 





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