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Start your review of Las sombras de la mente Write a review Shelves: neuroscience The argument is simple. If you device an algorithm to solve that kind of problems, and let a computer run the algorithm, it would never stop.

Yet the human mathematician is able to solve that kind of problems. Computational neuroscience and Artificial Intelligence treats the brain as a computer: either there is a neuronal signal or not, very much similar to the 0 and 1 scheme. But that algorithmic The argument is simple.

There must be a non-computable ingredient. Microtubules is the best candidate for that. Think of a unicellular organism, like an amoeba. How does it know where to go and what to do? It has no nervous system, not even a single neuron. Yet it does what it does, by the means of these cellular automata.

One more thing: it appears that things at that molecular level behave according to the strange laws of quantum mechanics, providing the non-computable ingredient. This is an extraordinary approach to the problem of consciousness, and Penrose is a humble man although in one of his interviews he pointed out to the interviewer that he should be called "Sir" Roger Penrose!

He clearly states that the argument is strong at least for the quality of understanding. In fact it is the only argument that I know of that holds water and I think by now I have heard them all from Searles chinese room to the fundamental energy limitations of recursive simulation models.

The mechanics and technical details of the argument get a little complex Penrose approach is very systematic, often formal, and quite exhaustive - a large spectrum of mathematical, logical and philosophical corner cases are covered but broad strokes are easy enough to follow. The argument runs as follows.

The truthfulness of those mathematical statements can be ascertained by humans but not by universal turing machines i. It is exactly that kind of understanding that computers lack. The second half of the book looks for a non-computational yet scientific basis for human intelligence. Absolutely fascinating overview of the field and its conundrums. No surprises here - we all know TOE is still work in progress and Penrose view is that it is QM that would need to be radically modified to be consistent with relativity, not the other way around.

Anyway, QM itself is very well-defined, precise and unambiguous but it is in its transition to non-quantum reality via state vector reduction where quite a few difficulties arise. Or to put it simply QM is perfectly well-defined i. But in the end the author brings us to Hameroff-Penrose theory of consciousness that is linked to OR objective reduction of a wave function. And in the brain this non-computational process takes place not among the neurons themselves but in cytoskeleton microtubules within neurons.

A gallop through QM and its difficulties was a bit masochistic but I did enjoy it. As far as microtubules — clearly highly speculative but Penrose says so himself at the outset, so I suppose you can take it or leave it.

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## Acerca de un mal uso del teorema de Gödel en la especulación sobre la mente

Dutaur But perhaps more important, in this volume he points the way to a new science, one that may eventually explain the physical basis of the human mind. As far as microtubules — clearly highly speculative but Penrose so,bras so himself at the outset, so I sombrws you can take it or leave it. However, I broke through this barrier and was able to glean from it the nuggets that I could understand. Want to Read Currently Reading Read. But it is something different from exploring the ordinary properties of the ordinary natural numbers. He clearly states that the argument is strong at least for the quality of understanding.

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## Las sombras de la mente

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