On the origin of minds
Pamela Lyon
Pamela Lyon
Quote:The philosopher Daniel Dennett, among the earliest cognitive philosophers to invoke evolution, dubbed natural selection ‘Darwin’s dangerous idea’ because it showed that the appearance of design in nature requires no designer, divine or otherwise. Like most of his colleagues, philosophical and scientific, Dennett didn’t buy the continuity of mental evolution. However, my view is that this neglected insight of Darwin’s was his most radical idea, one with the potential to induce a full-blown Copernican revolution in the cognitive sciences and to transform the way we see the world and our place in it.
Quote:These arrays might be processing more information than imagined. Escherichia coli recently were found to reject the bacterial equivalent of junk food due to sluggish growth. Chemotaxis, movement toward or away from some states of affairs, is one of E coli’s most energetically costly behaviours; it should be puzzling that bacteria will leave available food (the proverbial bird in the hand) and continue foraging for better nutrition elsewhere – except that the strategy often works. Caenorhabditis elegans, a small-brained worm, does this, too. If it has fed on high-quality food in the past, the tiny worm will leave poor-quality food in anticipation of finding something better. This discovery was a stunner at the time because such behaviour was assumed to require a ‘higher-order’ decision-making capacity.
Quote:The second challenge to neuroscience arrived when a heroic scientific success disclosed a ‘surprising failure’. The wiring diagram of the C elegans brain, a project started in cognitivism’s heyday, was completed. Connections between the worm’s 302 neurons were mapped, and behaviours associated with most cell types defined. Yet this stunning achievement revealed little about how and why a worm behaves the way it does – the aim of the research. According to the neuroscientist Cori Bargmann, C elegans studies ‘suggest that it will not be possible to read a [neural] wiring diagram as if it were a set of instructions’ for behaviour. This is for two main reasons...
'Historically, we may regard materialism as a system of dogma set up to combat orthodox dogma...Accordingly we find that, as ancient orthodoxies disintegrate, materialism more and more gives way to scepticism.'
- Bertrand Russell
- Bertrand Russell