Twitbrain - Mind-body problem?
Re: Continuing the Twitbrain strand of thought
I would be willing to accept Twitter as a brain in the circumstance where it acts as the “head” of the organism. I think that, if you consider the Twitter community as the start and end of the being, it could in fact act as both brain and nervous system. Our analogies really only differ in the placement of the neurons. And, in the context of this metaorganism, perhaps there is no distinction between the two structures; that may very well be a chiefly-biological phenomenon.
However, when one includes those outside of the Twitter community as part of the system, then it seems more peripheral than central in nature, to me at least, because many groups of people/body regions remain relatively unaffected by it. This would be those whose lives have yet to intertwine with the Internet on the same level as the rest of us, be it by choice or incidence.
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In reply to the clip above:
System boundaries
To be honest I despite O’Reilly’s post, I hadn’t considered the Twitbrain as involving more people than actually use Twitter. I also don’t really consider them as being part of the brain, when I drill down more deeply.
Unintentional signals
Consider the analogy of individual Twitterers as being Start Trek spaceships undertaking their own journey. I choose Star Trek because they sometimes made use of their drive signatures as a means of communication. Tweets, although more intentional than the noise of a starship engine, are rather like the background radiation generated - they have a degree of regularity, will tend to be produced when the vessel is changing direction and convey information, but are not the primary motivation of the vessel.
Set in a Twitbrain context, people lead their lives but produce this ancillary ‘noise’ which drives the Twitbrain analogue. Of course, the users are also acting as the ‘neurons’, which complicates the picture slightly, but I think it is OK for them to have multiple distinct roles.
Brain and nervous system
I would agree that it may be better to consider the central nervous system as the analogue here, certainly when considering other SNS as well. But I would not want to convey my modeling of Twitter as a brain as implying a hierarchy or control function. I think of the Twitbrain as an emergent property of the interaction of many highly connected processing units.
Metaorganism
As n00bh4×0r suggests, this Twitbrain is a metaorganism - or at least, part of one. I am not sure yet whether it has other organs. It appears to be enjoying a symbiotic relationship with the host-humans which provide it with processing power. It would be interesting to try to define some tests to see how well it works as a cognitive system.
As @Yishaym suggested, with the biological mind we are fairly sure that individual neurons cannot be aware (possibly at all, but especially) of the whole structure - they do not seem to us to have any purpose or goals other than to act as parts of the brain. We, on the other hand, have separate existences and are aware (if this model is right) of the Twitbrain. It would be interesting to work out whether the Twitbrain as a whole (not the individuals within it) is in some way aware of its neurons, and whether it is aware that they have their own unique identities and motivations. If it doesn’t (and I cannot imagine how to work out how to test this at the moment) then it begs the question of whether our view of neurons being (relatively) simple processing units (in the sense of hugely complex components which we don’t actually understand all that well!) is right.
Twitter and communities
Of course, there is nothing particularly special about Twitter. The same model could equally well apply to other communities. One of the differences about Twitter is that it has global reach, and that the computer mediated communications mean that signals are conveyed quickly. Also, because it is not geographically bounded, it has the ability to continue background processing when individual neurons (people) are in a resting state.

