If there was no mistake and it actually is the case that a universal wave function that's in a very ordered state at the beginning of time is predicted to simulate a continuously branching timeline after that time, the theory that there is a universal wave function that's in a very ordered state at the beginning of time is called the many worlds interpretation.
What I don't understand is how it's even possible that the universal wave function simulates a continuously branching timeline. I don't know much about quantum mechanics so can you give an answer I'm more likely to be able to understand?
Let's take for example an led light bulb with a direct current running through it. I suspect that if you run square root of half the voltage through it, it emits the same spectrum at half the brightness. According to the Copenhagen interpretation, if you look at it when it's half the brightness, you have one future that observes it as having half the brightness, not two futures one of which observes it at full brightness and one of which observes it as being off.
On the other hand, I believe that under the theory of a universal wave function that's very ordered at the beginning of time, when the timeline splits for the first time ever, the universal wave function simulates multiple universal wave functions each of which starts at a time after that time and each of those simulates multiple universal wave functions each of which starts at an even later time so the universal wave function simulates a universal wave function where you brain is not in superposition and then later goes into superposition after you observe the energy level of an atom, and that's why people sometimes say your brain wasn't in superposition before the observation when it actually was and only went in superposition after the observation.
If you brain is following a universal wave function that is not in superposition, how is it possible that an intermediate state of the atom gives you two noninteracting futures instead of a single future which observes the intermediate state like happens in the case of an led light bulb at half the brightness according to the Copenhagen interpretation. Could there be a mistake? Did people actually figure out using only the math itself that a universal wave function with a very ordered state at the beginning of time simulates a continuous branching timeline, or were they so sure of certain assumptions that they just assumed the truth of a certain mathematical statement and didn't do the math to check whether that statement was actually true? One possible mistake somebody could make is that a smooth object has a microscopically thin layer of hexane on it so we observe water to have a different contact angle with it than the math shows that the theory predicts it will have so they assume the theory predicts it and don't do the math to check.