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Old 13th April 2008, 05:45 PM   #42
Reality Check
Penultimate Amazing
 
Join Date: Mar 2008
Location: New Zealand
Posts: 26,437
Originally Posted by wogoga View Post
A further example of the missing genetic information (quote from Wikipedia):
"The human brain has a huge number of synapses. Each of the 10^11 (one hundred billion) neurons has on average 7,000 synaptic connections to other neurons. It has been estimated that the brain of a three-year-old child has about 10^15 synapses (1 quadrillion). This number declines with age, stabilizing by adulthood."
I hope you agree that if the vast majority of this huge number of synaptic connections were built up randomly, a normal human behaviour could not emerge. On the one hand we a relevant genetic information of 10^7 or 10^8 byte for the total ontogenetic development, and on the other hand only in the brain an architecture involving 10^15 synaptic connections. This results in less than 10^-7 or 10^-8 byte genetic information per synapse.

So whereas the genetic information of a human only constitutes a small fraction of the storage capacity of a DVD disc of 4.7 Gigabyte, in order to store all the synaptic connections of a three-year-old child, around a million DVD discs are needed.
Congratulations Wolfgang - you have just proved that learning is impossible since all of the synapse connections in the brain are hard-coded in DNA !
As any biologist can tell you, neural development starts from a mostly random network of synaptic connections. Connections are then reinforced by learning.
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