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Vladimir_Nesov comments on Getting Over Dust Theory - Less Wrong
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Though beware the trap of thinking that things must have one explanation rather than, say, 562 partial explanations, 46 decent explanations, 8 good explanations and 4 truly thorough explanations, all useful and all at different levels of abstraction or organization. Seriously, humans really suck at remembering this when thinking about things removed from their day-to-day experience or where signaling games dominate, like psychology, philosophy, theology, politics, politics, politics, politics...
It's unlikely that there are no few reasons much more powerful than all the rest, that everything is aligned exactly. So if one is tempted to explain using many weak reasons, or any reasons visibly weaker than other known reasons, that would suggest that the weak reasons are fake explanations obscuring what's really going on, even if all of these reasons are true.
That's a correct, non-obvious and useful consideration generally. Though in the situation I had in mind (explaining "akrasia": the lack of a thing) there are many "explanations" that are truly useful explanations---just not uniquely powerful ones. And in (a model of) a complex system each (overlapping, continuous...) level of abstraction has its own set of ways to fail. (There's probably some kind of relevant point exemplified by our back-and-forth here.) "Irrationality", like "akrasia", is another lack-of-thing with enticing "explanations", and "rationality" is a thing.