Gregory_Lewis comments on In defence of epistemic modesty - Effective Altruism Forum

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Comment author: RobBensinger 02 November 2017 09:04:05PM *  1 point [-]

Unfortunately, many of these questions tend to be the sort where a convincing adjudication is far off (i.e. it seems unlikely to discover convincing proof of physicalism any time soon).

I think a convincing object-level argument could be given; you could potentially show on object-level grounds why the specific arguments or conclusions of various rationalists are off-base, thereby at least settling the issue (or certain sub-issues) to the satisfaction of people who take the relevant kinds of inside-view arguments sufficiently seriously in the first place. I'd be particularly interested to hear reasons you (or experts you defer to) reject the relevant arguments against gods, philosophical zombies, or objective collapse / non-realism views in QM.

If you mean that a convincing expert-consensus argument is likely to be far off, though, then I agree about that. As a start, experts' views and toolkits in general can be slow to change, particularly in areas like philosophy.

I assume one part of the model Eliezer is working with here is that it can take many decades for new conceptual discoveries to come to be widely understood, accepted, and used in a given field, and even longer for these ideas to spill over into other fields. E.g., some but not all philosophers have a deep understanding of Shannon, Solomonoff, and Jaynes' accounts of inductive inference, even though many of the key insights have been around for over fifty years at this point. When ideas spread slowly, consensus across all fields won't instantly snap into a new state that's maximally consistent with all of the world's newest developments, and there can be low-hanging fruit for the philosophers who do help import those ideas into old discussions.

This is why Eliezer doesn't claim uniqueness for his arguments in philosophy; e.g., Gary Drescher used the same methodology and background ideas to arrive largely at the same conclusions largely independently, as far as I know.

I'd consider the big advances in decision theory from Wei Dai and Eliezer to be a key example of this, and another good example of independent discovery of similar ideas by people working with similar methodologies and importing similar ideas into a relatively old and entrenched field. (Though Wei Dai and Eliezer were actively talking to each and sharing large numbers of ideas, so the independence is much weaker.)

You can find most of the relevant component ideas circulating before that, too; but they were scattered across multiple fields in a way that made them less likely to get spontaneously combined by specialists busy hashing out the standard sub-sub-arguments within old paradigms.

Comment author: Gregory_Lewis 02 November 2017 11:59:46PM 1 point [-]

I agree such an object level demonstration would be good evidence (although of course one-sided, for reasons Pablo ably articulates elsewhere). I regret I can't provide this. On many of these topics (QM, p-zombies) I don't pretend any great knowledge; for others (e.g. Theism), I can't exactly find the 'rationalist case for Atheism' crisply presented.

I am naturally hesitant to infer from the (inarguable) point that diffusion of knowledge and ideas within and across fields takes time that he best explanation for disagreement is that rationalists are just ahead of the curve. I enjoyed the small parts of Drescher I read, but I assume many reasonable philosophers are aware of his work and yet are not persuaded. Many things touted in philosophy (and elsewhere) as paradigm shifting insights transpire to be misguided, and betting on some based on your personal assent on the object level looks unlikely to go well.

I consider the decision theory work a case-in-point. The view that the F- U- T- DT is this great advance on decision theoretic state of the art is a view that is very tightly circumscribed to the rationalist community itself. Of course, many decision theorists are simply ignorant of it given it is expounded outside the academic press. Yet others are not: there were academic decision theorists who attend some MIRI workshops, others who have been shown versions (via Chalmers, I understand), and a few who have looked at MIRI's stuff on Arxiv and similar. Yet the prevailing view of these seems to be at best lukewarm, and at worst scathing.

This seems challenging to reconcile with a model of rationalists just getting to the great insights early before everyone else catches up. It could be the decision theorist community is so diseased so they cannot appreciate the technical breakthrough MIRI-style decision theory promises. Yet I find the alternative hypothesis where it is the rationalist community which is diseased and diving down a decision theory dead end without the benefit of much interaction with decision theory experts to correct them somewhat more compelling.

Comment author: RobBensinger 04 November 2017 12:38:07AM *  2 points [-]

To be clear, I'm not saying that the story I told above ("here are some cool ideas that I claim haven't sufficiently saturated the philosophy community to cause all the low-hanging fruit to get grabbed, or to produce fieldwide knowledge and acceptance in the cases where it has been grabbed") should persuade arbitrary readers that people like Eliezer or Gary Drescher are on the right track; plenty of false turns and wrong solutions can also claim to be importing neglected ideas, or combining ideas in neglected ways. I'm just gesturing at one reason why I think it's possible at all to reach confident correct beliefs about lots of controversial claims in philosophy, in spite of the fact that philosophy is a large and competitive field whose nominal purpose is to answer these kinds of questions.

I'm also implicitly making a claim about there being similarities between many of the domains you're pointing to that help make it not just a coincidence that one (relatively) new methodology and set of ideas can put you ahead of the curve on multiple issues simultaneously (plus produce multiple discovery and convergence). A framework that's unusually useful for answering questions related to naturalism, determinism, and reflective reasoning can simultaneously have implications for how we should (and shouldn't) be thinking about experience, agency, volition, decision theory, and AI, among other topics. To some extent, all of these cases can be thought of as applications of a particular naturalist/reductionist toolkit (containing concepts and formalisms that aren't widely known among philosophers who endorse naturalism) to new domains.

I'm curious what criticisms you've heard of MIRI's work on decision theory. Is there anything relevant you can link to?

Comment author: Gregory_Lewis 04 November 2017 08:22:29AM 0 points [-]

I don't think the account of the relative novelty of the 'LW approach' to philosophy makes a good fit for the available facts; "relatively" new is, I suggest, a pretty relative term.

You can find similar reduction-esque sensibilities among the logicial positivists around a century ago, and a very similar approach from Quine about half a century ago. In the case of the logical positivists, they enjoyed a heyday amongst the philosophical community, but gradually fell from favour due to shortcomings other philosophers identified; I suggest Quine is a sufficiently 'big name' in philosophy that his approach was at least widely appreciated by the relevant academic communities.

This is challenging to reconcile with an account of "Rationality's philosophical framework allows one to get to confidently get to the right answer across a range of hard philosophical problems, and the lack of assent of domain experts is best explained by not being aware of it". Closely analogous approaches have been tried a very long time ago, and haven't been found extraordinarily persuasive (even if we subset to naturalists). It doesn't help that when the 'LW-answer' is expounded (e.g. in the sequences) the argument offered isn't particularly sophisticated (and often turns out to be recapitulating extant literature), nor does it usually deign to address objections raised by dissenting camps.

I suggest a better fit for this data is the rationality approach looks particularly persuasive to people without subject matter expertise.

Re. decision theory. Beyond the general social epistemiological steers (i.e. the absence of good decision theorists raving about the breakthrough represented by MIRI style decision theory, despite many of them having come into contact with this work one way or another), remarks I've heard often target 'technical quality': Chalmers noted in a past AMA disappointment this theory had not been made rigorous (maybe things have changed since), and I know one decision theorist's view is that the work also isn't rigorous and a bit sloppy (on Carl's advice, I'm trying to contact more). Not being a decision theorist myself, I haven't delved into the object level considerations.

Comment author: RobBensinger 04 November 2017 04:53:28PM *  1 point [-]

The "Cheating Death in Damascus" and "Functional Decision Theory" papers came out in March and October, so I recommend sharing those, possibly along with the "Decisions Are For Making Bad Outcomes Inconsistent" conversation notes. I think these are much better introductions than e.g. Eliezer's old "Timeless Decision Theory" paper.

Quineans and logical positivists have some vague attitudes in common with people like Drescher, but the analogy seems loose to me. If you want to ask why other philosophers didn't grab all the low-hanging fruit in areas like decision theory or persuade all their peers in areas like philosophy of mind (which is an interesting set of questions from where I'm standing, and one I'd like to see examined more too), I think a more relevant group to look at will be technically minded philosophers who think in terms of Bayesian epistemology (and information-theoretic models of evidence, etc.) and software analogies. In particular, analogies that are more detailed than just "the mind is like software", though computationalism is an important start. A more specific question might be: "Why didn't E.T. Jaynes' work sweep the philosophical community?"