Re: Changing the past by forgetting

From: Jack Mallah <>
Date: Wed, 11 Mar 2009 19:47:07 -0700 (PDT)

--- On Tue, 3/10/09, Saibal Mitra <> wrote:
> I've written up a small article about the idea that you could end up in a different sector of the multiverse by selective memory erasure. I had written about that possibility a long time ago on this list, but now I've made the argument more rigorous.

Saibal, I have to say that I disagree. As you acknowledge, erasing memory doesn't recohere the branches. There is no meaningful sense in which you could end up in a different branch due to memory erasure.

You admit the 'effect' has no observable consequences. But it has no unobservable meaning either.

In fact, other than what I call 'causal differentiation', which clearly will track the already-decohered branches (so you don't get to reshuffle the deck), there is no meaningful sense in which "you" will end up in one particular future branch at all. Other than causal differentiation tracking, either 'you' are all of your future branches, or 'you' are just here for the moment and are none of them.


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Received on Wed Mar 11 2009 - 22:47:22 PDT

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