On 05 Mar 2013, at 19:39, Craig Weinberg wrote:



On Tuesday, March 5, 2013 12:45:11 PM UTC-5, Bruno Marchal wrote:

On 05 Mar 2013, at 08:43, Jesse Mazer wrote:



On Mon, Mar 4, 2013 at 11:27 PM, Pierz <pie...@gmail.com> wrote:
Really Craig? It invalidates mechanistic assumptions about eyes? I'm sure the researchers would be astonished at such a wild conclusion. All the research shows is brain plasticity in interpreting signals from unusual neural pathways. How does that invalidate mechanism?

Yes, I was confused at first by the statement in the first paragraph that the eyes "can confer vision without a direct neural connection to the brain" (maybe Craig was confused by this too?), but it seems that by "direct neural connection" they just mean an optic nerve wired directly to the brain, bypassing the spinal cord like the optic nerve normally does, since later in the article they do mention the eyes were connected (indirectly) to the brain via the spinal cord: "No one would have guessed that eyes on the flank of a tadpole could see, especially when wired only to the spinal cord and not the brain."

Even that would not be conceptually astonishing. My computer is not wired to anything, and I can still send you a mail. It would have meant only that optic cells have some wifi systems. Cute, without doubt, but still not a threat for computationalism. Improbable also, but who knows.

Bruno



If they were wireless from the start though, why use an optic nerve?

OK. That's show only that biological evolution did not invest in radio waves. Why? Interesting question. Probably not enough profitable locally, contrary to direct exchange of biochemical material.

Bruno





Craig






Jesse



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