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Notes and Reflections on Books and Media

by Hannah Leitheiser


Our Mathematical Universe: My Quest for the Ultimate Nature of Reality

Max Tegmark



So we're probably all familiar with Schrödinger's cat. In the Copenhagen interpretation, you will measure the cat as either dead or alive. In the many-worlds interpretation, you split forming a you where the cat is dead and one with a living cat, and whichever one you happen to be will determine what you see.

Then, of course, someone asks, what if I take the place of the cat? In the many-worlds point of view, just as there is always a world with a living cat, there will always be a world where you are still alive. So if you repeat the experiment, you find, however improbable, you always survive.

And so, before bed I got to thinking, a great deal is possible in quantum physics. You can't rule out, then, as time goes on, I will continue to survive, no matter how improbable. Even if I try to die, some unlikely thing will prevent it. There's no requirement that I'm happy or healthy, just conscious, which could make a kind of inescapable hell, at least until I could only survive with a violation of the laws of quantum physics.

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