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Recursive thinking, Newcomb's problem, and free will

felipec.substack.com

Newcomb's problem splits people 50/50 in two camps, but the interesting thing is that both sides think the answer is obvious, and both sides think the other side is being silly. When I created a video criticizing Veritasium's video This Paradox Splits Smart People 50/50 I received a ton of feedback particularly from the two-box camp and I simply could not convince anyone of why they were wrong.

That lead me to believe there must be some cognitive trap at play: someone must be not seeing something clearly. After a ton of debates, reading the literature, considering similar problems, discussing with LLMs, and just thinking deeply, I believe the core of the problem is recursive thinking.

Some people are fluent in recursivity, and for them certain kind of problems are obvious, but not everyone thinks the same way.

My essay touches Newcomb's problem, but the real focus is on why some people are predisposed to a certain choice, and I contend free will, determinism, and the sense of self, all affect Newcomb's problem and recursivity fluency predisposes certain views, in particular a proper understanding of embedded agency must predispose a particular (correct) choice.

I do not see how any of this is not obvious, but that's part of the problem, because that's likely due to my prior commitments not being the same as the ones of people who pick two-boxes. But I would like to hear if any two-boxer can point out any flaw in my reasoning.

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Causation absolutely is available in Newcomb, because the statement of the though experiment describes the causation.

That causation is irrelevant.

It can also be demonstrated mathematically that two-boxing is "better", by showing that it is the dominant strategy.

That's like saying saying two-boxing leads to better outcomes if we assume two-boxing leads to better outcomes. It's circular reasoning.

You assume we have to ignore the probability of the predictor. There's zero justification for that, other than the fact that you want the result to be two-box.

No, you can't, because you have no satisfying way to operationalize Omega's prediction without breaking the causal structure of the thought experiment.

Yes I can. It is trivial.

And you asserted it wasn't a paradox, and your "proof" was that a different example isn't a paradox.

No. Each example is standalone.

  • If you choose an answer to this question at random, what is the chance that you will be correct? A) 25% B) 0% C) 0% D) 0%

That example is not a paradox, and the answer depends on the choice.

Hence, they aren't probability theory, and you can't appeal to "probability theory" without doing the work to establish that your questioned claims follow from probability theory.

My claims follow directly from probability theory.

If p=0.99, then it follows that:

(1/n) Σᵢ₌₁ⁿ Xᵢ → 0.99

This is pretty much a tautology in probability theory.