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by eli_gottlieb
3255 days ago
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Ok, but what functional knowledge did we gain? Not "run this neural net, and an interesting thing happens". How are those 300 neurons implementing interesting motor behavior? What behavior are they really implementing? What's the algorithm, what's its goal? The connectome model only addresses the third and lowest levels of Marr's analysis of a cognitive/biological system. 1. Computational: What does the system aim to do? What problem does it solve? 2. Algorithmic: How does the system solve or approximately solve that problem? How does it accomplish its purpose as a part of the organism? 3. Implementation: How are cells and/or organs put together to implement that solution? You can have a very accurate picture of (3), and still lack any solid knowledge about (2) or (1). You can also sometimes have a clear picture of (2) and (3), but overgeneralize and wind up with a near-tautological theory for (1) -- that's the accusation being thrown at certain parts of theoretical neuroscience today. |
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