`I cooked up a little program that displays the relative measure of`

`observer-moments as a rather unfortunate person attempts to cross a couple`

`bridges. It avoids one problem in that the person suffers from short-term`

`memory loss and so convergent observer-moments cause increased measure where`

`they usually would not. It's a start nevertheless.`

Information and images are available here: http://www.kwinter.ca/d/mwi/

## Advertising

`If anyone can point me to more well developed methodology, I'd appreciate`

`it.`

Thanks Below is the text from the demonstration: June 10, 2005

`The purpose of this demonstration is to evaluate every possible sequence of`

`observer moments (OMs) where a person survives a life or death situation.`

`This is very similar to the Quantum Suicide thought experiment, however`

`instead of considering 50/50 chances of being killed by gunshot, a bridge is`

`used to show the relative measure of observer-moments derived from sequences`

`of observer-moments which survived the bridge crossing. The computer model`

`provides visualization and insight into quantum nudging whereby at a given`

`time prior to a dangerous situation, the OMs with greatest measure are`

`poised to avoid that danger. A person experiencing the most common OM`

`sequence is therefore nudged away from danger. This demonstration cannot`

`prove whether we live such most-common OM sequences, it just provides a`

`visualization.`

`This demonstration assumes that the Many Worlds Interpretation of Quantum`

`Mechanics (MWI) is correct. IE: A person (like you and me) experiences 1`

`sequence of OMs throughout our lives. Between moments we branch into`

`parallel universes which continue to split/diverge moment to moment.`

`Consider a person walking across a bridge. The bridge is 200m above the`

`ground. The person is not capable of knowing whether their steps will cause`

`them to walk off the bridge and cannot avoid falling to their relatively`

`certain death. The person staggers as he moves, from one point to the next`

`he takes each step in one of three ways:`

- straight ahead (S) - ahead to the left (L) - ahead to the right (R)

`The cause of the direction of each step is random, with an equal 1/3`

`probability that at each step the person will go straight ahead, ahead to`

`the left or ahead to the right. In fact, he does all three, branching into`

`different universes.`

`Presented is the result of a computer simulation which computes every`

`possible sequence of steps that conclude in his successful (alive) crossing`

`of the bridge. Each possible sequence is tested once and only once.`

`In the following simulations each square represents a position or an`

`observer-moment if the person has no short term memory. The problem being`

`ignored in this demonstration is that typically for OMs to be identical they`

`require the observer to experience the same mind-state for that moment,`

`including completely identical memories. This is ignored by suggesting that`

`for our purposes the observer has no short-term memory. So arriving at the`

`same square via different squares constitutes a convergent OM which`

`increases the measure of such OM.`

`The person starts on the square 5,1 and every possible sequence thereafter`

`is computed. Once all the sequences which resulted in the person making it`

`to the other side of the bridge were obtained, the individual OM instances`

`were counted, that is the number of times a successful sequence involved a`

`step on a certain square (OM). The percentages for each represent the`

`measure of those OMs, that is the percentage of total surviving sequences`

`which involved a step on that square.`

`A sequence is not successful (does not survive) if the person walks off the`

`bridge. A sequence is successful if the person lands on a square in the top`

`row without falling off the bridge.`

In this first example the bridge is straight:

`There are 153,273 successful sequences, the left-most being`

`L-L-L-L-S-S-S-S-S-S-S and the right-most being R-R-R-R-S-S-S-S-S-S-S. The`

`sequence with the most measure, though it only occurred once in simulation`

`is of course S-S-S-S-S-S-S-S-S-S-S.`

`In the second example the bridge has a hole in it, step where a box is`

`absent and die. Observe how this affects measure prior to the hole.`

`There are 82,782 successful sequences, the left-most being`

`L-L-L-L-S-S-S-S-S-S-S and the right-most being R-R-S-L-L-S-R-R-R-R-S. The`

`sequence with the most measure, though it only occurred once in simulation`

`(each possible sequence is tested once) would be L-R-L-S-S-S-S-S-S-S-S. I`

`find it interesting that this sequence does a zigzag at the beginning, due`

`to recombinant OMs "fleeing" the right side, causing the highest measure OM`

`to temporarily move right, taking them in (5,3).`

`The next step is of course to figure out how to represent measure with a`

`more realistic observer (having a functioning memory). Remember that almost`

`none of the concepts presented here have actually been proven, and so this`

`material should be taken simply as food for thought.`

I hope you have enjoyed this demonstration, David dav-id-AT-kwinte-r.ca (remove the hyphens and replace "AT" with "@") For more information:

`- Theory of Everything mailing list (where these topics are discussed at`

`length)`

`- Wikipedia: (Many-worlds interpretation of quantum mechanics, Quantum`

`Immortality, Quantum Suicide)`