# Re: The multiverse is unscientific nonsense??

`On Wed, 29 Nov 2023 at 11:17, Bruce Kellett <bhkellet...@gmail.com> wrote:`
```
> On Wed, Nov 29, 2023 at 11:13 AM Stathis Papaioannou <stath...@gmail.com>
> wrote:
>
>> On Wed, 29 Nov 2023 at 10:53, Bruce Kellett <bhkellet...@gmail.com>
>> wrote:
>>
>>> On Wed, Nov 29, 2023 at 10:40 AM Stathis Papaioannou <stath...@gmail.com>
>>> wrote:
>>>
>>>> On Wed, 29 Nov 2023 at 09:34, Bruce Kellett <bhkellet...@gmail.com>
>>>> wrote:
>>>>
>>>>> On Wed, Nov 29, 2023 at 9:29 AM John Clark <johnkcl...@gmail.com>
>>>>> wrote:
>>>>>
>>>>>> On Tue, Nov 28, 2023 at 5:14 PM Bruce Kellett <bhkellet...@gmail.com>
>>>>>> wrote:
>>>>>>
>>>>>> *> Given a long series of N spin measurements, MWI says that there is
>>>>>>> always one person who sees N spin-ups. Since this observation is
>>>>>>> certain,
>>>>>>> it has probability one. Whereas the Born probability of seeing N ups is
>>>>>>
>>>>>>
>>>>>>
>>>>>>  The probability that Bruce Kellett will see N spin-ups is indeed
>>>>>> one. However the probability that you will see  N spin-ups is not.
>>>>>> As I mentioned before, for this sort of discussion the way the English
>>>>>> language handles personal pronouns needs to be modified.
>>>>>>
>>>>>
>>>>> It is not a question of whether you will see the N spin-ups, or
>>>>> whether it is just one copy of Bruce Kellett that will see this. The
>>>>> incompatibility arises from the fact that the series of N spin-ups
>>>>> necessarily exits in MWI, where it only has probability 1/2^N from the
>>>>> Born
>>>>> rule.
>>>>>
>>>>
>>>> If you lived in any sort of universe where you were duplicated, there
>>>> would be some probability that you would see different outcomes.
>>>>
>>>
>>> So what? The problem you have is that you have changed the rules of the
>>> theory -- from a theory about what exists, to a theory about what you will
>>> see. Since you will only ever see one outcome, one world, you have reduced
>>> it from a theory of many worlds to a theory of a single world -- the world
>>> you will see!
>>>
>>
>> Obviously the Born rule under MWI is about the probability of what
>> outcome you will see.
>>
>
> As I pointed out, if it is a theory about what you will see, then it is a
> single world theory, since you will only ever see just one world. Hence the
> incompatibility with Many worlds, which is a theory about what exists.
>

If I pull a coloured ball out of a basket, there is a probability of what
ball I will see and a theory about what balls exist.

--
Stathis Papaioannou

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