Comment author: JWP 05 March 2014 11:06:39PM 9 points [-]

Hello, I'm Jennifer.

I'm here to get better at accomplishing my goals. I'd also like to get better at figuring out what my goals are, but I don't know if LW will help with that.

I don't identify as an aspiring rationalist. I try to be rational, but I am generally leery of identifying as much of anything. Labels are a useful layer of abstraction for dealing with people you don't really know well enough to consider as individuals, but I don't see much benefit in internally applying labels to oneself. If you do find it useful to think of yourself as an aspiring rationalist, I'd like to know what benefits you're seeing.

I have not so much lurked as sporadically encountered LW over the past several years. I don't recall how I first found the site, but I have followed links here on several separate occasions.

My historical usage pattern: * Follow a link to LW * Open a half dozen tabs (much like I do on TVTropes) * Read the tabs (usually from the sequences) * Realize that I've hit mental saturation * Close LW until the next time I stumble across a link

I became more interested in LW as a community when I got to know a community member in RL, but I still didn't register because I have an aversion to opening myself up to potentially hurtful comments on the internet, and LW seems particularly prone to the type of comment which I find most difficult to deal with. Then I decided to improve my criticism handling skills, so I registered.

Comment author: Oscar_Cunningham 01 March 2014 11:20:17AM 19 points [-]

People on LW have started calling themselves "rationalists". This was really quite alarming the first time I saw it. People used to use the words "aspiring rationalist" to describe themselves, with the implication that e didn't consider ourselves close to rational yet.

Comment author: JWP 01 March 2014 05:23:38PM 10 points [-]

Identifying as a "rationalist" is encouraged by the welcome post.

We'd love to know who you are, what you're doing, what you value, how you came to identify as a rationalist

Comment author: Wei_Dai 01 March 2014 09:21:52AM *  39 points [-]

So sharing evidence the normal way shouldn't be necessary. Asking someone "what's the evidence for that?" implicitly says, "I don't trust your rationality enough to take your word for it."

I disagree with this, and explained why in Probability Space & Aumann Agreement . To quote the relevant parts:

There are some papers that describe ways to achieve agreement in other ways, such as iterative exchange of posterior probabilities. But in such methods, the agents aren't just moving closer to each other's beliefs. Rather, they go through convoluted chains of deduction to infer what information the other agent must have observed, given his declarations, and then update on that new information. (The process is similar to the one needed to solve the second riddle on this page.) The two agents essentially still have to communicate I(w) and J(w) to each other, except they do so by exchanging posterior probabilities and making logical inferences from them.

Is this realistic for human rationalist wannabes? It seems wildly implausible to me that two humans can communicate all of the information they have that is relevant to the truth of some statement just by repeatedly exchanging degrees of belief about it, except in very simple situations. You need to know the other agent's information partition exactly in order to narrow down which element of the information partition he is in from his probability declaration, and he needs to know that you know so that he can deduce what inference you're making, in order to continue to the next step, and so on. One error in this process and the whole thing falls apart. It seems much easier to just tell each other what information the two of you have directly.

In other words, when I say "what's the evidence for that?", it's not that I don't trust your rationality (although of course I don't trust your rationality either), but I just can't deduce what evidence you must have observed from your probability declaration alone even if you were fully rational.

Comment author: JWP 01 March 2014 04:20:23PM 6 points [-]

when I say "what's the evidence for that?", it's not that I don't trust your rationality (although of course I don't trust your rationality either), but I just can't deduce what evidence you must have observed from your probability declaration alone even if you were fully rational.

Yes. There are reasons to ask for evidence that have nothing to do with disrespect.

  • Even assuming that all parties are perfectly rational and that any disagreement must stem from differing information, it is not always obvious which party has better relevant information. Sharing evidence can clarify whether you know something that I don't, or vice versa.

  • Information is a good thing; it refines one's model of the world. Even if you are correct and I am wrong, asking for evidence has the potential to add your information to my model of the world. This is preferable to just taking your word for the conclusion, because that information may well be relevant to more decisions than the topic at hand.