The visual system of the brain has the organization, computational profile, and architecture it has in order to facilitate the organism's thriving at the four Fs: feeding fleeing, fighting, and reproduction.
Vilayanur S. RamachandranWhat do we mean by "knowledge" or "understanding"? And how do billions of neurons achieve them? These are complete mysteries. Admittedly, cognitive neuroscientists are still very vague about the exact meaning of words like "understand," "think," and indeed the word "meaning" itself.
Vilayanur S. RamachandranIn fact, on one occasion, a rather pedantic experimental psychologist was telling him about a long, complicated experiment he had done, incorporating all the proper controls and using considerable technical virtuosity. When he saw Crick's exasperated expression he said, "but Dr. Crick, we have got it right - we know it's right," Crick's response was, "The point is not whether it's right. The point is: does it even matter whether its right or wrong?"
Vilayanur S. Ramachandran