The Emperor’s New Mind: Concerning Computers, Minds and The Laws of Physics
Book by Roger Penrose
Here is a summary of the book that is first, a very deep read, and, second, full of detailed mathematics that were beyond me. I just skipped those parts. However, it is an incredible book and one that has extended my knowledge in so many ways. I think that it isn’t going too far to say that it has amended my knowledge tremendously and I am so glad to have read it, even at the age of 81.
The Emperor’s New Mind (1989) by Roger Penrose argues that human consciousness involves non-computable processes, meaning a computer can never fully replicate the human mind, even if it can simulate its functions. Penrose uses Gödel’s incompleteness theorems and quantum mechanics to support his view, suggesting that consciousness arises from physical processes in the brain that are not algorithmic, and that a deeper understanding of physics, possibly involving quantum gravity, is needed to explain the mind. The book explores the “mind-body problem” and challenges the idea that all thinking is computation, proposing that human understanding can grasp truths that formal systems cannot.
Key arguments and concepts
Gödel’s Incompleteness Theorems: Penrose argues that human mathematicians can see the truth of certain mathematical statements that a formal system (like a computer program) cannot prove, demonstrating a non-computable aspect of human thought.
Non-computability: He posits that certain mental activities, like mathematical insight, are inherently non-algorithmic and cannot be simulated by a computer, even a powerful one.
Quantum mechanics and consciousness: Penrose suggests that consciousness is linked to quantum mechanical processes in the brain, specifically involving microtubules, a theory he later developed further in Shadows of the Mind.
Critique of Strong AI: The book challenges the “strong AI” hypothesis that a sufficiently complex computer can achieve genuine consciousness, arguing that it misunderstands the nature of human understanding.
Reception and legacy
The book won the 1990 Science Book Prize.
It sparked debate and collaboration, notably with Stuart Hameroff, leading to the “orchestrated objective reduction” (Orch OR) theory of consciousness.
It remains a significant work in the philosophy of mind, artificial intelligence, and the physics of consciousness, influencing discussions on the limits of computation and the nature of the mind.
A few, difficult shots of two deer taken yesterday.
These two, a male and a female, were resting close to the back deck. I had to be extremely careful in taking these five photographs.
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As I have said many times before, I feed the deer every morning. They know, I’m sure, that they are loved by us. Two or three of them are waiting for their feed practically every morning. As soon as I go into the stables, to get the feed, more deer arrive and, typically, I put out the feed for between five and nine deer.
It is my habit to listen to BBC Radio 4 in the early morning. Especially The World at One from 13:00 to 13:45 BST and then, usually, the 15-minute programme transmitted immediately afterwards.
Yesterday, that programme was the start of a new ten-part series called RINSED. Here’s how it is described on the website:
1. The Bridge
Rinsed.
Episode 1 of 13
After watching their local river grow murky and lifeless, two retired neighbours decide to take on the water industry and its regulators. The unlikely sleuths begin a ten-year battle to clean up our rivers.
On the banks of the River Windrush in Oxfordshire, Kate Lamble meets campaigners Ash Smith and Peter Hammond
Reported and presented by Kate Lamble Producer: Elle Scott Sound Design: Andy Fell Executive Producer: Joe Kent Commissioning Executive: Tracy Williams Commissioning Editor: Dan Clarke
Rinsed is a BBC Studios production for BBC Radio 4
The following essay from George Monbiot is a difficult read but it is also a necessary read.
With the news that the polar ice caps are retreating, just read yesterday: “Polar ice caps and sheets are shrinking at alarming rates due to global warming, with Arctic sea ice decreasing by over 12% per decade and polar ice sheets losing 7,560 billion tonnes of ice between 1992 and 2020. Greenland and Antarctica are losing hundreds of billions of tons of ice annually, significantly contributing to rising sea levels. [1, 2, 3, 4]”
ooOOoo
Alternating Current
Posted on 29th April, 2026
If this crucial circulation system shuts down, the civilisational impacts will be irreversible. So why isn’t it a top priority?
By George Monbiot, published in the Guardian 23rd April 2026
The poor and middle pay taxes, the rich pay accountants, the very rich pay lawyers – and the ultra-rich pay politicians. It’s not an original remark, but it bears repeating until everyone has heard it. The more money billionaires accumulate, the greater their control of the political system – which means they pay less tax, which means they accumulate more, which means their control intensifies.
They reshape the world to suit their demands. One of the symptoms of the pathology known as “billionaire brain” is an inability to see beyond their own short-term gain. They would sack the planet for a few more stones on the pointless mountain of wealth. And we can see it happening. Last week delivered the biggest news of the year so far, perhaps the biggest news of the century. But partly because billionaires own most of the media, most people never heard it. We might find ourselves committed to a civilisation-ending event before we even learn that such a thing is possible.
The news is that the state of a crucial oceanic circulation system has been reassessed by scientists. Some now believe that, as a result of climate breakdown changing the temperature and salinity of seawater, it is more likely than not to collapse. This system – known as the Atlantic meridional overturning circulation (Amoc) – delivers heat from the tropics to the North Atlantic. Recent research suggests that if it shuts down, it could cause both a massive drop in average winter temperatures in northern Europe and drastic changes in the Amazon’s water cycles. This could help tip the rainforest into cascading collapse and trigger further disaster.
Amoc’s shutdown is likely also to cause an acceleration of sea level rise on the east coast of the US, threatening cities. It could also raise Antarctic temperatures by roughly 6C and release a vast pulse of carbon currently stored in the Southern Ocean, accelerating climate catastrophe.
Even when the countervailing effects of generalised global heating are taken into account, a further paper proposes, the net impact in northern Europe would be periods of extreme cold – including events in which temperatures in London fall to -19C, in Edinburgh to -30C and in Oslo to -48C. Sea ice in February would extend as far as Lincolnshire. Our climate would change drastically, with the likelihood of far greater extremes, such as massive winter storms. Rain-fed arable agriculture would become impossible almost everywhere in the UK.
This shift, on any realistic human scale, would be irreversible. Its speed is likely to outrun our ability to adapt. Amoc shutdowns, driven by natural climate variability, have happenedbefore. But not in the era of large-scale human civilisation.
The first paper proposing that Amoc might have an on-state and an off-state was published in 1961. Since then, many studies have confirmed the finding and explored potential triggers and likely implications. Until recently, Amoc collapse caused by human activity fell into the category of a “high impact, low probability” event, devastating if it happens, but unlikely to occur.
Research over the past few years prompted a reassessment: it began to look more like a “high impact, high probability” event. Now, in response to last week’s paper, Prof Stefan Rahmstorf – perhaps the world’s leading authority on the subject – says the chances of a shutdown look like “more than 50%”. We could pass the tipping point, he says, “in the middle of this century”.
So why is this not all over the news? Why is it not the top priority for the governments that claim to protect us from harm? Well, in large part because oligarchic power has championed a model of climate impact that bears little relation to reality: that is, they have a hypothesis about how the world works that is completely detached from scientific findings. This model underpins official responses to the climate crisis.
It began with the work of the economist William Nordhaus, who sought to assess the economic effects of global heating. His modelling suggests that a “socially optimal” level of heating is between 3.5C and 4C. Most climate scientists see a temperature rise of this kind as catastrophic. Even 6C of heating, Nordhaus suggests, would cause a loss of just 8.5% of GDP. Climate science suggests it would look more like curtains for civilisation.
As the eminent economists Nicholas Stern, Joseph Stiglitz and Charlotte Taylor have argued, the mild effects Nordhaus forecasts are merely artefacts of the model he has used. For example, his modelling assumes that catastrophic risks do not exist and that climate impacts rise linearly with temperature. There is no climate model that proposes such a trend. Instead, climate science forecasts nonlinear impacts and greatly escalating risk.
The likely impacts of high levels of heating include the inundation of major cities, the closure of the human climate niche (the conditions that sustain human life) across large parts of the globe, the collapse of the global food system and cascading regime shifts – that is, abrupt transitions in ecosystems – releasing natural carbon stores, potentially leading to a “hothouse Earth” in which very few survive. Never mind a few points off GDP: there would be no means of measurement and scarcely an economy to measure.
Bizarrely, the modelling also applies discount rates to future people: their lives, it assumes, are worth less than ours. In other words, it has taken a method used to calculate returns to capital and applied it to human beings. As the three economists point out, “it is very difficult to find a justification for this in moral philosophy.” Moreover, climate impacts disproportionately affect the poor – but under the models, their lives are also priced down.
Unsurprisingly, models of this kind, Stern, Stiglitz and Taylor note, have been seized on by “special interests” such as the fossil fuel industry to argue for minimal responses to the climate crisis. And it’s not just the oil companies. Bill Gates, who claims to want to protect the living planet, has given $3.5m (£2.6m) to a junktank run by Bjorn Lomborg, who has built his career on promoting Nordhaus’s model, thus helping to downplay the need for climate action. Nordhaus was awarded the Nobel Memorial prize for economics for his pernicious nonsense – and it is deeply embedded in government decision-making.
A billionaire death cult has its fingers around humanity’s throat. It both causes and downplays our existential crisis. The oligarchs are not just a class enemy but, as they have always been, a societal enemy: a few thousand people can destroy civilisations. It’s the billions v the billionaires, and the stakes could not possibly be higher.
Until I came to live in the the USA permanently, in 2010, I used to live in South Devon, near Totnes. Thus the AMOC was very familiar to me and the local population. AMOC stands for Atlantic Meridional Overturning Circulation. Much more information on AMOC may be read on the WikiPedia site.
Although the future of the AMOC is uncertain, many scientists are concerned that the AMOC will weaken.
The above article by George Monbiot is potentially frightening. As Monbiot says at the end; “… a few thousand people can destroy civilisations.“
What we need is a few thousand people to make this the number one priority! Not tomorrow but today!
The astronauts on Artemis II’s trip to the Moon in April 2026 didn’t just have an amazing journey through space. They also saw something extraordinary. They were the first humans to see a total solar eclipse from space.
From Earth, the circle of the Sun is about the same size as the circle of the Moon. With the bright circle blocked, you can see the undulating rays of the Sun’s corona, or outer atmosphere, that are normally too dim to be observed.
During my second total eclipse, the period of totality – that short span when you can remove your protective glasses and look directly at the eclipse – lasted close to 4 minutes. I saw waves of diffuse light snaking around an ink-black hole in the sky. It looked very wrong – almost alien.
On Aug. 12, 2026, there will be another total solar eclipse, visible only from Greenland, Iceland, Spain and the Balearic Islands of the Mediterranean. Some fortunate viewers in Spain and nearby islands may see the eclipse just before sunset, low on the horizon. The Moon illusion, a phenomenon where the Moon looks bigger when it’s near the horizon, might make this eclipse look unusually large.
Unusual eclipse perspectives
Astronauts will occasionally also have less common eclipse experiences. I interviewed one I call by the pseudonym “Jackie” in my research about astronauts’ experiences of awe. She was part of an astronaut training group that did a flight exercise during a total solar eclipse.
Jackie and her squad flew their jets in the shadow of the Moon. This lengthened their time in totality because they could follow and stay within the shadow. Jackie was most impressed with how the Sun’s corona seemed to shift and ripple.
“It’s not static … it’s alive,” she told me.
On April 6, 2026, the astronauts of NASA’s Artemis II mission saw another kind of unusual eclipse as they flew around the Moon. At one point during their flight, the Moon and the spacecraft aligned so that the Moon was directly between them and the Sun, blocking the Sun’s disk in a way that looks very different from what we see on Earth.
The astronauts were so close to the Moon that the Moon looked bigger than the Sun and hid more of its bright circle. Earth was also in view, and sunlight reflected from the Earth onto the Moon in a phenomenon NASA calls “earthshine.” This dim light is very similar to the moonlight that shines on the Earth at night.
Imagine the Sun hidden behind the Moon, creating a hazy halo around the Moon’s edges. At the same time, faint light reflected from Earth softly illuminates the Moon, revealing mountains and craters in a dim twilight. Now imagine this striking scene lasting 54 minutes.
This sight was, without a doubt, one of the most unusual eclipses ever seen by human eyes.
Although Artemis’ astronauts are trained to think scientifically, this experience propelled them into a state of awe. They talked openly about how their brains were “not processing” what they observed. While NASA kept them busy with a variety of tasks, the sound of emotion and excitement in their voices as they broadcast live from their lunar flyby was unmistakable.
The Moon during a solar eclipse on April 6, 2026, photographed by one of the Orion spacecraft’s cameras during Artemis II. Earth is reflecting sunlight at the left edge of the Moon, called ‘earthshine.’ NASA
One astronaut said she gained an awareness of the fragility of our planet that now shapes everything she does, while another described becoming more curious after returning to Earth. A third said the awe he experienced in lunar orbit changed his understanding of time and infinity.
Space travel creates many opportunities for awe, but a solar eclipse from behind the Moon, as Mission Commander Reid Wiseman put it, required “20 new superlatives.”
It’s an experience most of the earthbound eclipse-chasers heading to Greenland or Iceland or Spain this summer will only dream about. Whether eclipses happen in space or on Earth, though, close encounters with the grandeur of our universe can make you feel profoundly human.
In this difficuly world at present, this is a perfect article. As was written, “…. the awe he experienced in lunar orbit changed his understanding of time and infinity.“
During the week of the 20th to 24th April, 2026, BBC Radio 4, immediately after the World At One, at 13:45-14-00 BST, presented a fifteen-minute series on death. The episode of the April 22nd, 2026 was called Lay This Body Down. It is summarised as follows:
As our society becomes more secular, more people feel like they want to do death their own way. That’s leading to a range of new options for disposing of dead bodies.
Now watch this:
Jean and I have opted for human composting after we have died. It is a natural process and details may be found here.
Learning from Dogs 