Tag: the Brain

The Undesigned Brain is Hard to Copy

By Kyle Munkittrick | January 17, 2011 10:47 am


UPDATE: Hanson has responded and Lee has rebutted. My reaction after the jump.

The Singularity seems to be getting less and less near. One of the big goals of Singularity hopefuls is to be able to put a human mind onto (into? not sure on the proper preposition here) a non-biological substrate. Most of the debates have revolved around computer analogies. The brain is hardware, the mind is software. Therefore, to run the mind on different hardware, it just has to be “ported” or “emulated” the way a computer program might be. Timothy B. Lee (not the internet inventing one) counters Robin Hanson’s claim that we will be able to upload a human mind onto a computer within the next couple decades by dissecting the computer=mind analogy:

You can’t emulate a natural system because natural systems don’t have designers, and therefore weren’t built to conform to any particular mathematical model. Modeling natural systems is much more difficult—indeed, so difficult that we use a different word, “simulation” to describe the process. Creating a simulation of a natural system inherently means means making judgment calls about which aspects of a physical system are the most important. And because there’s no underlying blueprint, these guesses are never perfect: it will always be necessary to leave out some details that affect the behavior of the overall system, which means that simulations are never more than approximately right. Weather simulations, for example, are never going to be able to predict precisely where each raindrop will fall, they only predict general large-scale trends, and only for a limited period of time. This is different than an emulator, which (if implemented well) can be expected to behave exactly like the system it is emulating, for as long as you care to run it.

In short: we know how software is written, we can see the code and rules that govern the system–not true for the mind, so we guess at the unknowns and test the guesses with simulations. Lee’s post is very much worth the full read, so give it a perusal.

Lee got me thinking with his point that “natural systems don’t have designers.” Evolutionary processes have resulted in the brain we have today, but there was no intention or design behind those process. Our minds are undesigned.

I find that fascinating. In the first place, because it means that simulation will be exceedingly difficult. How do you reverse-engineer something with no engineer? Second, even if a simulation is successful, it by no means a guarantees that we can change the substrate of an existing mind. If the mind is an emergent property of the physical brain, then one can no more move a mind than one could move a hurricane from one system to another. The mind, it may turn out, is fundamentally and essentially related to the substrate in which it is embodied. Read More

You Fall in Love Because Your Brain is a Jellyfish, Lizard, and Mouse Ice Cream Cone

By Kyle Munkittrick | August 19, 2010 10:45 am

braincreamconeHuman beings are the peak of evolution, right? Our advanced brains allow us to poke one another on Facebook, send rockets to the moon, and order complex drinks at Starbucks. We can even fall in love. How are we able to do all of that? NPR’s Science Podcast has been doing a running series “The Human Edge” in which they discuss various things about humans that make us, well, human. NPR’s John Hamilton tackled brain evolution and how we humans still carry parts of other ancestral animal brains within us. Feel that pebble in your shoe? Thank a jellyfish. Ever duck before a rogue Frisbee collides with your noggin? Thank a lizard. Remember where you left your keys? Thank a mouse.

Hamilton interviewed David Linden from John Hopkins University who explained that our brain is the way it is because evolution is “the ultimate tinkerer and cheapskate.” Evolution built our brain by taking simpler brains and just piling more brains on top – like adding scoops of ice cream to an ice cream cone. Hence, the pieces of our brain inherited from these other creatures are largely unchanged. The result is that our advanced, intricate, special gray-matter is spectacularly inefficient, poorly designed, and ill-suited to many of our daily needs. On the flipside, evolution’s Frankensteinian cobbling together of various animal brains is precisely why human beings can experience higher emotions like love. Our ice-cream-cone-brain has created some of our best, and most uniquely human, attributes. After the jump is an illustrated guide of how the forces of natural selection shaped your mighty mind from distant relatives of jellyfish, lizards, and mice. Read More

CATEGORIZED UNDER: Mind & Brain
MORE ABOUT: evolution, Love, the Brain

SciNoFi Blog Roundup – 4th of July Edition

By Sam Lowry | July 4, 2008 11:22 am

What are you doing at your computer?  Get outside!

  • And all men are created equal [via BoingBoing]:   

Where the Hell is Matt? (2008) from Matthew Harding on Vimeo.

CATEGORIZED UNDER: Medicine, Politics
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