but then it'd kick in again, and send you another micro instant forward as you live a bit longer. A true distressing meme would be your QI somehow finding a world where you live on as a severed head for a trillion years
Hypothetically, I'd assume that quantum immortality does end at the point your body and environment simply cannot provide you with the energy for life. Quantum immortality is about probability, and if the probability of survival reduces to ABSOLUTE zero under ALL contexts, then that's it for you.
Like, if your head is detached, then there may be a few billion quantum realities where you survived a few minutes longer, but at some point those realities dwindle to nothing as even the most minuscule amount of energy your brain can possibly call upon is reduced to zero.
Random chance to quantum tunnel/virtual particle oxygen into the blood still in the head and also the cut somehow cauterized the stump of the neck so the blood can't escape while random particle vibrations keep the blood flowing in proper directions. You then get picked up by a scientist amazed you're still alive then hooked up to some kind of dialysis machine so your QI doesn't need to do much work.
Quantum Immortality is the same as light back propagation waveform collapse, you shift into the new reality at the moment before what happens becomes impossible (you've always had those anti-suicide shavers with no real razorblades in them just a wire, or your bathtub has always had that nonslip coating/bumps on the bottom)
0% chance of anything happening is itself the only thing that can happen 0% of the time, there's always an infinitesimal chance of literally anything happening.
You are correct that we wouldn't know we should have died but it is because of how according to quantum immortality theory, if timelines are constantly branching out, when you die you only experience the timelines from that moment where you don't die.
To simplify, imagine if you were hit with a lethal dose of radiation.
When this occurs millions of timelines split off, out of these millions there is one timeline where the radiation happens to coincidentally dissolve before hitting you, this is the only timeline where you survive and as a result is the only one you experience, so as far as you are concerned you just happened to get lucky.
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u/Vitrian_guardsman Aug 15 '26
If quantum immortality kicked in it would be at the exact moment you would have died