Assumption: Most people are not truthseeking.

Therefore, a rational truthseeking person's priors would still be that the person they are debating with is optimizing for something else, such as creating an alliance, or competing for status.

Collaborative truthseeking would then be what happens where all participants trust each other to care about truth. That not only each of them cares about truth privately, but that this value is also common knowledge.

If I believe that the other person genuinely cares about truth, then I will take their arguments more seriously, and if I am surprised, I will be more likely to ask for more info.

I share Richard Kennaway's feeling that this is a rather strange question because the answer seems so obvious; perhaps I'm missing something important. But:

"Collaborative" just means "working together". Collaborative truthseeking means multiple people working together in order to distinguish truth from error. They might do this for a number of reasons, such as these:

• They have different skills that mesh together to let them do jointly what they could not do so well separately.
• The particular truths they're after require a lot of effort to pin down, and having more people working on that can get it done quicker.
• They know different things; perhaps the truth in question can be deduced by putting together multiple people's knowledge.
• There are economies of scale; e.g., a group of people could get together and buy a bunch of books or a fast computer or a subscription to some information source, which is almost as useful to each of them as if they'd paid its full price on their own.
• There are things they can do together that nudge their brains into working more effectively (e.g., maybe adversarial debate gets each person to dig deeper for arguments in a particular direction than they would have done without the impetus to compete and win).

There is a sense in which collaborative truth-seeking is built out of individual truth-seeking. It just happens that sometimes the most effective way for an individual to find what's true in a particular area involves working together with other individuals who also want to do that.

Collaborative truth-seeking may involve activities that individual truth-seeking (at least if that's interpreted rather strictly) doesn't because they fundamentally require multiple people, such as adversarial debate or double-cruxing.

Being "collaborative" isn't a thing that in itself brings benefits. It's a name for a variety of things people do that bring benefits. Speech-induced state changes don't result in better predictions because they're "collaborative"; engaging in the sort of speech whose induced state changes seem likely to result in better predictions is collaboration.

And yes, there are circumstances in which collaboration could be counterproductive. E.g., it might be easier to fall into groupthink. Sufficiently smart collaboration might be able to avoid this by explicitly pushing the participants to explore more diverse positions, but empirically it doesn't look as if that usually happens.

Related: collaborative money-seeking, where people join together to form a "company" or "business" that pools their work in order to produce goods or services that they can sell for profit, more effectively than they could if not working together. Collaborative sex-seeking, where people join together to form a "marriage" or "relationship" or "orgy" from which they can derive more pleasure than they could individually. Collaborative good-doing, where people join together to form a "charity" which helps other people more effectively than the individuals could do it on their own. Etc.

(Of course businesses, marriages, charities, etc., may have other purposes besides the ones listed above, and often do; so might groups of people getting together to seek the truth.)

I'm a big fan of collaborative truth-seeking, so lemme try to explain what distinction I'd be communicating with it:

In an idealized individual world, you would be individually truth-seeking. This would include observing information, and using te information to update your model. You might also talk to others, which for various reasons (e.g. to help your allies or to fit in with social norms about honesty and information-sharing or ...) might include telling them (to the best of your ability) the sorts of true, relevant information that you would usually use in your own decision-making.

However, the above scenario runs into some problems, mostly because the true, relevant information that you'd usually use in your own decision-making might be simplified in various ways, for instance rather than concerning your observations directly, it concerns latent variable inferences that you've made on the basis of these observations. These latent variables are inferred from your capacity to observe, and for your capacity to make decisions, so it can be difficult for others to apply them. In particular:

• You might have phrased it in language that is factually very incorrect but evocative for your purposes (e.g. I remember talking to someone who kept saying gay men have female brains, and then it turned out that what he really meant was that gay men were psychologically feminine in a lot of ways).
• You might be engaging in mind-projection (e.g. if it is tricky from your perspective, under your constraints, to precisely observe the differences between some entities, then you might just model them as being inherently the same, and when differences do pop up, you might assume them to be stochastic).
• You might have implicit assumptions that you haven't explicitly stated or precisified, which affect how you interpret things.

There's also the issue that everyone involved might have far less evidence than could be collected if one went out and systematically collected it.

If one simply optimizes one's model for one's own purposes and then dumps the content of the model into collective discourse, the above problems tend to make the discourse get stuck because nobody is ready to deeply change anybody's mind, and instead only ready to make minor corrections to others who are engaging from basically the same perspective.

These problems don't seem inevitable though. If both parties agree to set a bunch of time aside to dive in deep, they could work to fix it. For instance:

• By clarifying what purposes one is applying the concepts to, and what one is trying to evoke, one can come up with some better definitions that make information more straightforwardly transferable.
• By explicitly listing the areas of uncertainty, one can figure out what open questions there are, and what effects independence assumptions have, which can guide further investigations.
• Similarly, explicating implicit assumptions helps with identifying cruxes, or communicating methods for obtaining new information, or better understanding the meaning of one's claims.
• When working together, the amount of evidence it is "worth" collecting will often be higher, because it influences more people. Furthermore, the evidence that does get collected can be of higher quality, because it is made robust against more concerns, for more perspectives.

Basically, collaborative truth-seeking involves modifying one's map so that it becomes easier to resolve disputes by collecting likelihood ratios, and then going out to collect those likelihood ratios.

One thing that I've come to think is that a major factor to clarify is one's "perspective" or "Cartesian frame", as in. which sources of information is one getting, and which areas of actions can one take within the subject matter. This perspective influences many of the other issues, and therefore is an efficient thing to talk about if one wants to understand them.

I don't hear this phrase much, so I suspect it's heavily context-specific in it's usage. If I were to use it at work, it'd probably be ironic, as a euphemism for "let me correct your thinking".

I can imagine it being used as a way to explicitly agree that the participants in a discussion are there to each change their minds, or to understand and improve their models, by comparing and exchanging beliefs with each other. Truth-seeking is the intent to change your beliefs, collaborative truth-seeking is the shared intent to change the group members' beliefs.