The Science and Technology section of this week’s Economist brought a rather fascinating article to my attention. The study, on the relation between brain activity and human cognition, seems to show that the brain activity linked to problem-solving occurs before the person is actually aware of having had the insight. So if humans are able to solve problems before being consciously aware of the solution… what is the point of conscious thought?
In the study, the researchers asked volunteers to solve a set of simple puzzles, which lacked methodical solutions, in the hope of synthesizing some of those ‘eureka!’ moments characteristic of the insight process. The volunteers had to respond as soon as they reached the solution, and their brainwaves were monitored with an on-going electroencephalogram (EEG).
An analyses of the EEG showed that up to 8 seconds before the response, brain activity was different when the volunteers got the insight, i.e. reached the correct solution either with or without a hint, compared when they didn’t. I don’t think there are many takers on what these differences in brain activity (reduction in posterior beta oscillation power and increase in anterior gamma power) functionally mean, but the finding remains: unconscious background processing delivers the answer to consciousness only once it has been arrived at.
Although this may come as a shock to many, there have in fact been similar reports published over the last three decades. The seminal work of Libet in the 1980s demonstrated that the brain activity for the self-initiated movement of a finger begins 300ms before one is even aware of wanting to move the finger. Moreover, at our own Univeristy of Oxford, Hakwan Lau et al. recently showed that a human’s conscious perception of when a movement is initiated is actually open to TMS manipulation up to 200msec after the action took place.
You have to wonder what kind of implications this build-up of evidence has for topics such as free will, ethics and responsibility. If my brain has already made a decision before I am consciously aware of it, would this imply that I do not have a conscious free will? People who commit crimes whilst under the influence of mental illness, for example, receive lighter treatment on grounds of diminished responsibility, because it is argued that they weren’t really in control of their actions at the time. But if my consciousness tunes into a decision (to commit a crime, or otherwise!) only after the decision has already been made, can I be said to be in control of my actions?
For millenia, philosophers and scientists have debated the question of what conscious experience is and what its function might be, from Descartes’ dualism to modern scientists who try to find its possible evolutionary function. There is not space for a full discussion here, but opinions range from those who think that conscious awareness has no purpose “so just enjoy the ride“, to those who propose that it is necessary for the human species’ unique ability to pursue complex goals. However, this latter theory is certainly in contention, not least from the EEG article I’ve described here but also by the fact that Deep Blue, a computer that is arguably not conscious, can beat world Grandmasters at chess, the ultimate game of abstract goal pursuit.
Setting aside for the moment the problem of what consciousness is (i.e. how something subjective can come out of something physical), I am currently very perplexed by the second question: what is consciousness for? If not for controlling our actions or helping us achieve cognitive insights, why on earth do we have it? None of the current explanations around are particularly satisfying. Answers on a postcard, please.
Reclaiming the Human Rights Agenda
Last week, I attended the UN’s Durban Review Conference against Racism, Racial Discrimination, Xenophobia and Related Intolerance(‘Durban II’).
Eight years ago, the world witnessed how a conference convened to combat racism became a shameful spectacle of anti-Semitism: how countries and organisations equated Zionism with Nazism, flagging the swastika symbol; how the voices of, among others, victims of the Rwandan Genocide, of the persecuted Falun Gung and Tibetians in China, of disenfranchised women in Saudi Arabia, and of victims of female genital mutilation in sub-Saharan Africa, were silenced, while the bulk of the conference focused on the Israeli-Palestinian conflict.
The preparatory stages of the review conference raised the fear that it would, again, prove futile in providing an effective forum for scrutinising egregious human rights violations and would instead restrict freedom of speech which constitutes ‘defamation of religion’ (code-word for the Danish cartoon affair), call for slavery reparations, and make, yet again, the Israel/Palestine conflict its cause célèbre. Consequently, America, Canada, Australia and Germany, among others, boycotted the conference, while other countries, including Britain, sent low-level delegations.
Sadly, it was not long before the apprehensions materialised, and an anti-racism conference provided, yet again, a platform for hatred. The Iranian President, Mahmoud Ahmadinejad, notorious for hosting a Holocaust denial conference last year in Tehran and for suggesting, when addressing Columbia University, that there are no gays in Iran (where homosexuality is punishable by death), gave a keynote speech on the opening day.
Ahmadinejad asserted that the establishment of Israel came about ‘on the pretext of Jewish sufferings’, and, as if quoting from the Protocols of the Elders of Zion (an early 20th century anti-Semitic tract) concluded that ‘[Zionists have] penetrated into the [world] political and economic structures including their legislation, mass media, companies, financial systems and their security and intelligence agencies … to the extent that nothing can be done against their will.’ Most of the Western countries attending the conference walked out of the assembly hall in protest.
The speech took place hours before the commemoration of 64 years since the Holocaust. As a son of a Holocaust survivor, this was both painful and disillusioning: painful to experience anti-Semitism professed from the UN podium by a head of state, with (some) delegates enthusiastically clapping; disillusioning to see how the world allows, yet again, an anti-hatred conference, which in its outcome document ‘recalls that the Holocaust must never be forgotten’, to be hijacked by bigots.
My academic research focuses on human rights law, I volunteer for Rene Cassin, a human rights organization, and co-convene the Human Rights Discussion Group of the law faculty; I believe that international fora have an important role to play in preventing human rights abuses. This is why it was so disheartening to see Libya chairing this conference; to see Iran’s representative elected vice-president; to hear the Afghan delegate proudly reporting on the advent of women’s rights just a few weeks after the adoption of legislation de-criminalising marital rape; to NOT hear, in four days of deliberations, the word Darfur mentioned, a genocide six years in the making.
The face of the UN is ours, and so is its fate. The Bush administration wrongly adopted a hands-off approach: we should not give up on human rights. But engagement should not mean complacency or submission; what happened in Geneva was disgraceful, not just to Jews or to ‘the West’, but to every world citizen. It is high time we reclaim the human rights agenda.