Principles of Neural Science, Fifth Edition (Principles of Neural Science (Kandel)) 5th Edition
This has never been a good proxy for truth. It is also completely irrelevant given that the majority of the world has never studied neuroscience.
>science has no idea what consciousness is
Not true. Neuroscience has discovered a lot about consciousness. I recommend Principles of Neural Science if you're interested: https://www.amazon.com/Principles-Neural-Science-Fifth-Kande...
>Plus, there are all kinds of problems and contradictions if the mind reduces to matter.
This is a good text, at an upper-div/grad level, of fundamental neuroscience with all sources cited.
That particular connection is straightforward to do in humans. A Golgi stain to the rector muscles/ON and dissection in cadavers would be sufficient to trace the reflex to the SC and then another Golgi stain to that area to get back to the optic nerve. I'm unfamiliar with the toxicity of Golgi stains, but it may be able to be done alive.
Also, the visual systems to the brain-stem are remarkably conserved through evolution. I would not be surprised to see this connection in lampreys. That any significant percent of humans lack it would be a hell of paper.
Blind individuals usually have these reflexes too (like Stevie Wonder): https://en.wikipedia.org/wiki/Blindsight
For more information on the sensation of taste and all it's myriad complexities, you may want to check out these resources:
https://www.amazon.com/Principles-Neural-Science-Fifth-Kande... The bible of neural sciences, though thick and dense, the sections on gustation and olfaction may prove useful to your endeavors.
Edit: Here are some other resources on how to modify your taste sensation to better understand how your taste buds work:
There is also a supplement that you can take that will elliminate your sensation of sweet for a few hours, but I forget the name
Lastly, to understand umami, try getting a few bags of chips of similar salt content and hold your nose the entire time. One of just regular Lays potato chips, one of something like Doritos, and one of those baked Parmesan cheese ships from whole foods. While eating them with your nose held close, try to recognize the changes in the umami taste.