Saibal,

Does
your conclusion about conditional probability also apply to complex-valued
probabilities a la Youssef?

-- Ben
Goertzel

-----Original Message-----From:Bruno Marchal [mailto:[EMAIL PROTECTED]Sent:Tuesday, May 03, 2005 4:20 AMTo:Saibal MitraCc:everything-list@eskimo.comSubject:Re: Many worlds theory of immortality

Le 16-avr.-05, à 02:45, Saibal Mitra a écrit :

Both the suicide and copying thought experiments have convinced me that the

notion of a conditional probability is fundamentally flawed. It can be

defined under ''normal'' circumstances but it will break down precisely when

considering copying or suicide.

This is a quite remarkable remark. I can related it to the COMBINATORS thread.

In a nutshell: in the *empirical* FOREST there are no kestrels (no eliminators at all),

nor Mockingbird, warblers or any duplicators. Quantum information behaves

like incompressible fluid. Universes differentiate, they never multiplies.

Deutsch is right on that point. I use Hardegree (ref in my thesis(*)) He did show that

quantum logic can be seen as a conditional probability logic.

We will come back on this (it's necessarily a little bit technical). I am finishing a

technical paper on that. The COMBINATORS can help to simplify considerably

the mathematical conjectures of my thesis.

Bruno

(*) Hardegree, G. M. (1976). The Conditional in Quantum Logic. In Suppes, P., editor,Logic and Probability in Quantum Mechanics, volume 78 ofSynthese Library, pages 55-72. D. Reidel Publishing Company, Dordrecht-Holland.

http://iridia.ulb.ac.be/~marchal/