By your second sentence it follows that such structures aren't a leap of faith. It is very possible.
2. Human intellect and consciousness is one of the most complex nuanced phenomena we are aware of in the universe.
complexity isn't indicative of efficiency.
3. The human brain is one of the most complex things we know about in the universe.
Same as above.
4. We know very many things about how the brain processes information. We know structure and function are heavily intertwined. We know that the brain uses virtually every aspect of neural biology, from macro structures down to intracellular mechanisms, to facilitate information processing.
But we don't know whether the entire structure is efficient.
>That is all evidence to support the belief that the complexity of the brain is meaningful with respect to the production of human intelligence.
But it is not evidence supporting the thesis that the brain being inefficient is a leap of faith.
>It seems that you want to believe that most of that complexity is not meaningful, and your only evidence is "you had a feeling" and "biology is inefficient sometimes".
The feeling has been rationalized. I explained the logic, it is now backed up. The criterion here is not absolutist. The criterion is just stating whether or not such a scenario is likely. IS it a leap of faith or is it not? I've sufficiently proved that the brain being inefficient is clearly NOT a leap of faith.
>If you want to prove it's not a leap of faith, you have to present examples in which the information processing of the brain is actually inefficient, or how it can be replaced by a much simpler system. Otherwise it's all just a guess.
Easy we have many ML models that already beat humans at certain tasks.. Those models use much less neurons then the entire brain itself and follows a much simpler model. See spam filters. It shows that a simpler model is already possible for certain aspects of intelligence.
I disagree with you. I believe I've shown enough evidence to move the probability out of "leap of faith" territory. I just threw in the example up above because you requested it.