Wei_Dai comments on Call for new SIAI Visiting Fellows, on a rolling basis - Less Wrong

29 Post author: AnnaSalamon 01 December 2009 01:42AM

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Comment author: Eliezer_Yudkowsky 04 December 2009 07:05:57PM 1 point [-]

Pearl's causal networks can be encoded in ZFC

That's what I would expect most mathematical-existence types to think. It's true, but it's also the wrong thought.

Wei, do you see it now that I've pointed it out? Or does anyone else see it? As problems in philosophy go, it seems like a reasonable practice exercise to see it once I've pointed to it but before I've explained it.

Comment author: Wei_Dai 05 December 2009 07:13:40PM 1 point [-]

Eliezer, I still don't understand Pearl well enough to answer your question. Did anyone else get it?

Right now I'm working on the following related question, and would appreciate any ideas. Some very smart people have worked hard on causality for years, but UDT1 seemingly does fine without an explicit notion of causality. Why is that, or is there a flaw in it that I'm not seeing? Eliezer suggested earlier that causality is a way of cashing out the "mathematical intuition module" in UDT1. I'm still trying to see if that really makes sense. It would be surprising if mathematical intuition is so closely related to causality, which seems to be very different at first glance.