system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Quantum suicide and immortality

I read the wiki, didn't understand it that much (I got bits and pieces but am confused to what it really is)

It has been asked on ELI5 before but the guy deleted his post which I never got to see.

Edit: wow, went to a wedding and came back 13 hours later to see my post has lots of responses (which I have all read) thanks a lot, I think I really understand it now.
gpt
You have to remember that it is a thought experiment so you will need to go back and forth a bit.

So you are in a room and a photon's spin is measured every 10 seconds. The measuring device will kill fire the gun if it's going clockwise and the measuring device will not fire the gun if it's going anticlockwise.

The first measurement happens.  It's anticlockwise.  So you have survived.  And the second measurement happened.  It's also anticlockwise.  This could theoretically keep going.  You could go through a million iterations and still survive, despite this being such an improbable thing.  

However, the many-world interpretation says that each time this measurement occurs, the universe is split into a universe where it was clockwise and a universe where it was anticlockwise.  So to the you right now, you think that you have survived.  But you died in another universe where the spin was clockwise. 

So that means even if you do die in this universe, you will be alive in another universe, and you can keep getting the device to measure the spin of photons and it can keep saying that it's anticlockwise, where you are immortal. 


What this thought experiment is saying, is that in this universe, where you survived 1 million times, you are conscious of having survived. That means that you are aware that there are universes other than this one in which you did die.