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Comment author: Pimgd 14 February 2017 05:04:37PM 1 point [-]

The important parts, for me:

Research subjects who believe in ego depletion (that willpower is a limited resource) show diminishing self-control over the course of an experiment, while people who don’t believe in ego depletion are steady throughout. What’s more, when subjects are manipulated into believing in ego depletion through subtly biased questionnaires at the outset of a study, their performance suffers as well.

Seeing willpower as a muscle-like force does seem to match up with some limited examples, such as resisting cravings, and the analogy is reinforced by social expectations stretching back to Victorian moralizing. But these ideas also have a pernicious effect, distracting us from more accurate ways of understanding human psychology and even detracting from our efforts toward meaningful self-control. The best way forward may be to let go of “willpower” altogether.

--

Okay so I'm halfway through the article, right, and I get the feeling that this author has a point. Maybe "Willpower" as a term is too broad.

But then I think about Akrasia and how adjusting your situation so that you do not need to expend willpower to take actions which help advance long term goals is helpful for discussing things. And these are... seemlingly in conflict, but both true.

... So is this community using the same definition of willpower as the author?

The author describes his version of willpower as "finite and exhaustible", as something books say you can increase, and the modern definition of willpower, "the capacity for immediate self-control".

I think that adjusting a situation so that you don't need to restrain yourself on a daily basis is a good strategy. One of the reasons for that is that restraining yourself uses resources. The author seems to say that there is no such resource to consume, there is no willpower. Or, more specifically, if you believe that there is such a resource, then there is, and if you don't believe that there is such a resource, then there isn't.

... Then the author concludes that since willpower can only hold you back, humanity as a species should let go of the whole idea. Sure, we'll lose a term to describe this ... "thing", but the advantages will be all the greater.


I'm left confused, though.

Say you erase the idea of willpower from the general population. People still lapse in self-control, but muuuuch less than they do right now. How would you go about explaining your friend (who is having more trouble with self-control than others) that, you know, maybe if he did his groceries shopping earlier in the day, he wouldn't be so hungry during the groceries shopping and thus would be making less impulse buys? Without the concept of willpower, lest you unleash that demon on civilization.

(That's a poor argument though, because I'm saying "but wait, even if everyone is better off, what about this one guy")

Maybe a stronger version; how do you explain to people that forcing everything is bad? That you shouldn't put yourself through life in a way where you have to fight yourself every step of the way?


I think my POV on this is "if what you're saying is true, then yes, we should scrap it. Before we do that, though, I have this one thing I'm worried about..."

Comment author: Wes_W 14 February 2017 06:48:40PM 1 point [-]

"Willpower is not exhaustible" is not necessarily the same claim as "willpower is infallible". If, for example, you have a flat 75% chance of turning down sweets, then avoiding sweets still makes you more likely to not eat them. You're not spending willpower, it's just inherently unreliable.

Comment author: thrawnca 28 November 2016 05:17:30AM -1 points [-]

At some point you'll predictably approach death

I'm pretty sure that decision theories are not designed on that basis. We don't want an AI to start making different decisions based on the probability of an upcoming decommission. We don't want it to become nihilistic and stop making decisions because it predicted the heat death of the universe and decided that all paths have zero value. If death is actually tied to the decision in some way, then sure, take that into account, but otherwise, I don't think a decision theory should have "death is inevitably coming for us all" as a factor.

Comment author: Wes_W 29 November 2016 03:20:24AM *  1 point [-]

I'm pretty sure that decision theories are not designed on that basis.

You are wrong. In fact, this is a totally standard thing to consider, and "avoid back-chaining defection in games of fixed length" is a known problem, with various known strategies.

Comment author: thrawnca 31 October 2016 02:06:56AM *  0 points [-]

Your decision is a result of your decision theory

I get that that could work for a computer, because a computer can be bound by an overall decision theory without attempting to think about whether that decision theory still makes sense in the current situation.

I don't mind predictors in eg Newcomb's problem. Effectively, there is a backward causal arrow, because whatever you choose causes the predictor to have already acted differently. Unusual, but reasonable.

However, in this case, yes, your choice affects the predictor's earlier decision - but since the coin never came down heads, who cares any more how the predictor would have acted? Why care about being the kind of person who will pay the counterfactual mugger, if there will never again be any opportunity for it to pay off?

Comment author: Wes_W 31 October 2016 08:18:06PM *  1 point [-]

Yes, that is the problem in question!

If you want the payoff, you have to be the kind of person who will pay the counterfactual mugger, even once you no longer can benefit from doing so. Is that a reasonable feature for a decision theory to have? It's not clear that it is; it seems strange to pay out, even though the expected value of becoming that kind of person is clearly positive before you see the coin. That's what the counterfactual mugging is about.

If you're asking "why care" rhetorically, and you believe the answer is "you shouldn't be that kind of person", then your decision theory prefers lower expected values, which is also pathological. How do you resolve that tension? This is, once again, literally the entire problem.

Comment author: thrawnca 28 October 2016 05:20:17AM *  0 points [-]

there is no distinction between making the decision ahead of time or not

Except that even if you make the decision, what would motivate you to stick to it once it can no longer pay up?

Your only motivation to pay is the hope of obtaining the $10000. If that hope does not exist, what reason would you have to abide by the decision that you make now?

Comment author: Wes_W 28 October 2016 05:30:06AM *  1 point [-]

Your decision is a result of your decision theory, and your decision theory is a fact about you, not just something that happens in that moment.

You can say - I'm not making the decision ahead of time, I'm waiting until after I see that Omega has flipped tails. In which case, when Omega predicts your behavior ahead of time, he predicts that you won't decide until after the coin flip, resulting in hypothetically refusing to pay given tails, so - although the coin flip hasn't happened yet and could still come up heads - your yet-unmade decision has the same effect as if you had loudly precommitted to it.

You're trying to reason in temporal order, but that doesn't work in the presence of predictors.

Comment author: thrawnca 14 October 2016 03:21:25AM *  -1 points [-]

we want a rigorous, formal explanation of exactly how, when, and why you should or should not stick to your precommitment

Well, if we're designing an AI now, then we have the capability to make a binding precommitment, simply by writing code. And we are still in a position where we can hope for the coin to come down heads. So yes, in that privileged position, we should bind the AI to pay up.

However, to the question as stated, "is the decision to give up $100 when you have no real benefit from it, only counterfactual benefit, an example of winning?" I would still answer, "No, you don't achieve your goals/utility by paying up." We're specifically told that the coin has already been flipped. Losing $100 has negative utility, and positive utility isn't on the table.

Alternatively, since it's asking specifically about the decision, I would answer, If you haven't made the decision until after the coin comes down tails, then paying is the wrong decision. Only if you're deciding in advance (when you still hope for heads) can a decision to pay have the best expected value.

Even if deciding in advance, though, it's still not a guaranteed win, but rather a gamble. So I don't see any inconsistency in saying, on the one hand, "You should make a binding precommitment to pay", and on the other hand, "If the coin has already come down tails without a precommitment, you shouldn't pay."

If there were a lottery where the expected value of a ticket was actually positive, and someone comes to you offering to sell you their ticket (at cost price), then it would make sense in advance to buy it, but if you didn't, and then the winners were announced and that ticket didn't win, then buying it no longer makes sense.

Comment author: Wes_W 16 October 2016 06:49:57AM *  1 point [-]

You're fundamentally failing to address the problem.

For one, your examples just plain omit the "Omega is a predictor" part, which is key to the situation. Since Omega is a predictor, there is no distinction between making the decision ahead of time or not.

For another, unless you can prove that your proposed alternative doesn't have pathologies just as bad as the Counterfactual Mugging, you're at best back to square one.

It's very easy to say "look, just don't do the pathological thing". It's very hard to formalize that into an actual decision theory, without creating new pathologies. I feel obnoxious to keep repeating this, but that is the entire problem in the first place.

Comment author: thrawnca 11 September 2016 10:54:29PM 0 points [-]

if your decision theory pays up, then if he flips tails, you pay $100 for no possible benefit.

But in the single-shot scenario, after it comes down tails, what motivation does an ideal game theorist have to stick to the decision theory?

Like Parfit's hitchhiker, although in advance you might agree that it's a worthwhile deal, when it comes to the point of actually paying up, your motivation is gone, unless you have bound yourself in some other way.

Comment author: Wes_W 14 September 2016 11:29:34PM *  3 points [-]

But in the single-shot scenario, after it comes down tails, what motivation does an ideal game theorist have to stick to the decision theory?

That's what the problem is asking!

This is a decision-theoretical problem. Nobody cares about it for immediate practical purpose. "Stick to your decision theory, except when you non-rigorously decide not to" isn't a resolution to the problem, any more than "ignore the calculations since they're wrong" was a resolution to the ultraviolet catastrophe.

Again, the point of this experiment is that we want a rigorous, formal explanation of exactly how, when, and why you should or should not stick to your precommitment. The original motivation is almost certainly in the context of AI design, where you don't HAVE a human homunculus implementing a decision theory, the agent just is its decision theory.

Comment author: thrawnca 18 August 2016 02:42:02AM *  0 points [-]

The beggars-and-gods formulation is the same problem.

I don't think so; I think the element of repetition substantially alters it - but in a good way, one that makes it more useful in designing a real-world agent. Because in reality, we want to design decision theories that will solve problems multiple times.

At the point of meeting a beggar, although my prospects of obtaining a gold coin this time around are gone, nonetheless my overall commitment is not meaningless. I can still think, "I want to be the kind of person who gives pennies to beggars, because overall I will come out ahead", and this thought remains applicable. I know that I can average out my losses with greater wins, and so I still want to stick to the algorithm.

In the single-shot scenario, however, my commitment becomes worthless once the coin comes down tails. There will never be any more 10K; there is no motivation any more to give 100. Following my precommitment, unless it is externally enforced, no longer makes any sense.

So the scenarios are significantly different.

Comment author: Wes_W 18 August 2016 05:07:00PM 1 point [-]

There will never be any more 10K; there is no motivation any more to give 100. Following my precommitment, unless it is externally enforced, no longer makes any sense.

This is the point of the thought experiment.

Omega is a predictor. His actions aren't just based on what you decide, but on what he predicts that you will decide.

If your decision theory says "nah, I'm not paying you" when you aren't given advance warning or repeated trials, then that is a fact about your decision theory even before Omega flips his coin. He flips his coin, gets heads, examines your decision theory, and gives you no money.

But if your decision theory pays up, then if he flips tails, you pay $100 for no possible benefit.

Neither of these seems entirely satisfactory. Is this a reasonable feature for a decision theory to have? Or is it pathological? If it's pathological, how do we fix it without creating other pathologies?

Comment author: thrawnca 16 August 2016 10:29:35PM *  1 point [-]

This is an attempt to examine the consequences of that.

Yes, but if the artificial scenario doesn't reflect anything in the real world, then even if we get the right answer, therefore what? It's like being vaccinated against a fictitious disease; even if you successfully develop the antibodies, what good do they do?

It seems to me that the "beggars and gods" variant mentioned earlier in the comments, where the opportunity repeats itself each day, is actually a more useful study. Sure, it's much more intuitive; it doesn't tie our brains up in knots, trying to work out a way to intend to do something at a point when all our motivation to do so has evaporated. But reality doesn't have to be complicated. Sometimes you just have to learn to throw in the pebble.

Comment author: Wes_W 17 August 2016 03:36:27PM 1 point [-]

Decision theory is an attempt to formalize the human decision process. The point isn't that we really are unsure whether you should leave people to die of thirst, but how we can encode that in an actual decision theory. Like so many discussions on Less Wrong, this implicitly comes back to AI design: an AI needs a decision theory, and that decision theory needs to not have major failure modes, or at least the failure modes should be well-understood.

If your AI somehow assigns a nonzero probability to "I will face a massive penalty unless I do this really weird action", that ideally shouldn't derail its entire decision process.

The beggars-and-gods formulation is the same problem. "Omega" is just a handy abstraction for "don't focus on how you got into this decision-theoretic situation". Admittedly, this abstraction sometimes obscures the issue.

Comment author: thrawnca 15 August 2016 10:44:15PM 0 points [-]

Does this particular thought experiment really have any practical application?

I can think of plenty of similar scenarios that are genuinely useful and worth considering, but all of them can be expressed with much simpler and more intuitive scenarios - eg when the offer will/might be repeated, or when you get to choose in advance whether to flip the coin and win 10000/lose 100. But with the scenario as stated - what real phenomenon is there that would reward you for being willing to counterfactually take an otherwise-detrimental action for no reason other than qualifying for the counterfactual reward? Even if we decide the best course of action in this contrived scenario - therefore what?

Comment author: Wes_W 15 August 2016 11:49:46PM 1 point [-]

Precommitments are used in decision-theoretic problems. Some people have proposed that a good decision theory should take the action that it would have precommitted to, if it had known in advance to do such a thing. This is an attempt to examine the consequences of that.

In response to Fake Explanations
Comment author: Yosarian2 08 July 2016 08:39:17PM *  0 points [-]

I was just re-reading the sequences, and I have to say that as a teacher I really think you're misjudging what is happening here.

Much of learning, it seems, is building up a mental framework, starting from certain concepts and attaching new concepts to them so that they can easily be recalled later and so you can use the connections between concepts to develop your own thinking later..

From my point of view, it looks like the student (perhaps as long as a year ago) had successfully created a new concept node in their mind, "heat conduction". They had connected this node to the concepts of heat transfer and physics. And even though they likely hadn't activated this node at all in perhaps a year, they were able to take a specific example of something they saw in the real world, generalize it to something that might be related to the more general topic of heat transfer in physics, and create a hypothesis of heat conduction.

If you saw a machine learning algorithm that was able to do all that, you'd really be impressed! Something like Watson might be able to go from the concept of heat transfer to heat conduction, but it wouldn't be able to generalize from a specific example of heat transfer it saw in the real world.

Now, they might not yet have a lot of details attached to the "heat conduction" concept node in their head. But that's ok, that they can learn, that gives you something to build on as a teacher. If you teach it well and they can attach some details and images and maybe some math to the concept of "heat conduction" in the head, then hopefully next time they'll say "Maybe heat conduction? Hmmm, no, that doesn't work." which is even better. But there's more going on here then just "guessing a password"; this is part of what constructing a model of the world looks like while the process is only partly completed.

Comment author: Wes_W 11 July 2016 02:52:08AM 1 point [-]

I'm not sure you've described a different mistake than Eliezer has?

Certainly, a student with a sufficiently incomplete understanding of heat conduction is going to have lots of lines of thought that terminate in question marks. The thesis of the post, as I read it, is that we want to be able to recognize when our thoughts terminate in question marks, rather than assuming we're doing something valid because our words sound like things the professor might say.

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