I am not a boy because my parents observed my penis at the 12 week echo. I am a boy because the sperm cell that made me, carried the right chromosome. It was decided at fertilization. Even if my parents never observed me, I would still be a boy.
The experiment described in the Veritasium video splits a particle in an electron and a proton. They must have opposite spin and that is measured at the time of observation. Than there’s a whole discussion about faster than light communication, but if the spin is given at the moment of creation, both will have the opposite spin from the start. It can still be random and measurements will still have a 25% failure rate.
What am I missing? Can the spin change between creation and measurement?
What happens if a particle doesn’t get observed, does it not have spin?
Disclaimer: I’m probably oversimplifying it
The best way i can describe it is that the spin of the electron could be either, BUT when the observation is made, you now exist in one of the possible universes where it you and it are now entangled where it has only the spin that you observed.
This means there is (according to my lay person understanding) that after the observation there are now two discrete universes where each version of the particles exist with opposing spin.
That’s the multiple worlds theory, which is discussed in the video.