Dude, my post was precisely about how you’re making a mistake in applying the outside view. Was I being too vague, too referential? Okay, here’s the long version, stripped of jargon because I’m cool like that.
The point of the planning fallacy experiments is that we’re bad at estimating the time we’re going to spend on stuff, mainly because we tend to ignore time sinks that aren’t explicitly part of our model. My boss asks me how long I’m going to spend on a task: I can either look at all the subtasks involved and add up the time they’ll take (the inside view), or I can look at similar tasks I’ve done in the past and report how long they took me (the outside view). The latter is going to be larger, and it’s usually going to be more accurate.
That’s a pretty powerful practical rationality technique, but its domain is limited. We have no idea how far it generalizes, because no one (as far as I know) has rigorously tried to generalize it to things that don’t have to do with time estimation. Using the outside view in its LW-jargon sense, to describe any old thing, therefore is almost completely meaningless; it’s equivalent to saying “this looks to me like a $SCENARIO1”. As long as there also exists a $SCENARIO2, invoking the outside view gives us no way to distinguish between them. Underfitting is a problem. Overfitting is also a problem. Which one’s going to be more of a problem in a particular reference class? There are ways of figuring that out, like Yvain’s centrality heuristic, but crying “outside view” is not one of them.
As to whether LW is rational, I got bored of that kind of hand-wringing years ago. If all you’re really looking for is an up/down vote on that, I suggest a poll, which I will probably ignore because it’s a boring question.
Ok, I guess I could have inferred your meaning from your original post, so sorry if my reply was too snarky. But seriously, if that’s your point I would have just made it like this:
“Dude you’re only supposed to use the phrase ‘outside view’ with regards to the planning fallacy, because we don’t know if the technique generalizes well.”
And then I’d go back and change “take a step back and look at it from the outside view” into “take a step back and look at it from an objective point of view” to prevent confusion, and upvote you for taking the time to correct my usage of the phrase.
Dude, my post was precisely about how you’re making a mistake in applying the outside view. Was I being too vague, too referential? Okay, here’s the long version, stripped of jargon because I’m cool like that.
The point of the planning fallacy experiments is that we’re bad at estimating the time we’re going to spend on stuff, mainly because we tend to ignore time sinks that aren’t explicitly part of our model. My boss asks me how long I’m going to spend on a task: I can either look at all the subtasks involved and add up the time they’ll take (the inside view), or I can look at similar tasks I’ve done in the past and report how long they took me (the outside view). The latter is going to be larger, and it’s usually going to be more accurate.
That’s a pretty powerful practical rationality technique, but its domain is limited. We have no idea how far it generalizes, because no one (as far as I know) has rigorously tried to generalize it to things that don’t have to do with time estimation. Using the outside view in its LW-jargon sense, to describe any old thing, therefore is almost completely meaningless; it’s equivalent to saying “this looks to me like a $SCENARIO1”. As long as there also exists a $SCENARIO2, invoking the outside view gives us no way to distinguish between them. Underfitting is a problem. Overfitting is also a problem. Which one’s going to be more of a problem in a particular reference class? There are ways of figuring that out, like Yvain’s centrality heuristic, but crying “outside view” is not one of them.
As to whether LW is rational, I got bored of that kind of hand-wringing years ago. If all you’re really looking for is an up/down vote on that, I suggest a poll, which I will probably ignore because it’s a boring question.
Ok, I guess I could have inferred your meaning from your original post, so sorry if my reply was too snarky. But seriously, if that’s your point I would have just made it like this:
“Dude you’re only supposed to use the phrase ‘outside view’ with regards to the planning fallacy, because we don’t know if the technique generalizes well.”
And then I’d go back and change “take a step back and look at it from the outside view” into “take a step back and look at it from an objective point of view” to prevent confusion, and upvote you for taking the time to correct my usage of the phrase.