We need to find the answerWatch
Basically, if a death is determined by a quantum factor, the Schrodinger's cat thought experiment being an example, we can assume that there is a multiverse for survival and a multiverse for death. Your consciousness can only carry on a multiverse that you survive in so you would only experience the multiverse of survival. Assuming that this is true this means that, unless survival is 100% impossible meaning that you cannot be conscious in any multiverse, humans are arguably immortal.
So: if you replaced the cat in the box and put yourself in the box, assuming that you had a 50-50 chance of surviving every second, and you didn't die after a few minutes. You could arguably prove that quantum immortality is real. If you survived 100 seconds you would have a 7.9x10^-31 chance of surviving. However, you would die in other multiverses and so other multiverses would not have the necessary evidence and only you would have this proven to.
How can we prove it to all:
We need to take the cat out of the box and put the Earth in it. This would then require a much bigger box so we need leading engineers to make a box large enough that would fall apart, won't collapse into the Earth due to gravity etc.
If the world is not destroyed then we will ALL know that quantum immortality is real. If not, then at least we all died for the almighty God, physics A Lev *cough* physics research.
WE NEED YOU ALL TO WORK TO GET THIS DONE! QUANTUM IMMORTALITY MUST BE PROVEN!
tl;dr, we're going to put the Earth into a box and if it survives potential blowing up then quantum immortality is a thing.