Do We All See The Same Color? Questions on “Does the Soul Exist” Debate (#24)

Question: Do We All See The Same Color?

Hey Eric, I just recently finished listening to the debate and your in depth interview on the sin boldly podcast. I thought you handle yourself during the debate very professional and respectful. The only argument that I had a problem with was with regards to the color analogy you made a couple of times. Light and color are very well understood concepts. You asked how we know that the color we see is red. And Knight's knowledge CT Nov 2012we know this because light is measurable and travels in wavelengths. If I told you a ball was red and you asked how do I know? My answer is because we can measure the wavelength of the light reflected by the ball and if it’s in the 700 nanometer range than it is safe to say it is red. Other than that you made good arguments. For me though I believe Occam’s razor applies to this subject. When there are two competing hypothesis the one with the fewest assumptions is often the correct hypothesis. But you held your own during the debate and I look forward to listening in on your future debates.

-Tyler D.


I greatly appreciate your honest and kind remarks.

Unfortunately we didn’t talk more about color and consciousness which I would have loved to do. But of course we can only fit so much into the time we had. For those reading, this discussion was around the 107:20 minute mark of the debate.

I respectfully disagree about color and wavelength and here’s why: yes I understand that colors are correlated with wavelengths but the very question at hand is whether or not we are seeing the same color. The question could have been easily rephrased as to say something like, “How do we know that when you see wavelength x and I see wavelength x, that we are seeing the same color?” So to say we are seeing the dresssame color because the wavelength is the same is the very thing in question. As I mentioned in the debate, the “what color is the dress” issue was a question that had everyone on the internet disagreeing with what color the dress was, yet we were all looking at the same dress. The point is, even if the wavelength was the same, that in no way means that we are seeing the same color. This would refutes Matt’s position that displaying the same function and behavior would determine that we are in the same conscious state. Which he later said he wasn’t talking about consciousness, yet the very question during those ten minutes was “how do you determine what conscious state one is in”. He at first seemed to agree with Dennett and claimed that he and Dennett were ok with consciousness, then I pointed out Dennett does not think that consciousness exist. He agreed but quickly realized his contradiction and said, “how about instead of talking about them lets just talk about what we believe”.

And yes I thought he’d bring up Ockhams razor as well. However this would have sided with my view in my opinion because there are sincere phenomena that cannot be answered by his own view. Ockahms razor is the principle that an explanation of a phenomenon should include only elements within it necessary to explain that phenomenon and not postulate unnecessary explanations. However, when two rival theories are at play, such as my view, substance dualism, and Matt’s view, physicalism, then Matts view simply can not account for things such as the difference in properties between brain states and conscious states; my thoughts can brain testbe true or false but my brain is not true or false. I am hungry but my group of neurons firing are not hungry. Then we have other phenomena such as private and immediate access which is the fact that my thoughts are had by me and known by me. Contrast that with my brain or shape or size which can be known by anyone. In fact someone could know more about my brain than I do but not know more about my thought life than I do. This was another point in that series of questions where I was pointing out that in order to even correlate brain states with conscious state, one would have to ask the person what he or she was thinking. For example, when someone is asleep and has rapid eye movement, we know that this means that they are dreaming. However, we only know this because we woke the patient up and asked what they were experiencing. Or Lie-Detector-Testtake a lie detector: we only have an idea of whether or not a person is lying or telling the truth based on reading the tests only AFTER we have established a base line and correlation by asking. If this were a purely physical thing then all we would have to do is look at the brain, and yet even though we had the brain scan right in front of us, we still had to ask. Clearly brain correlations are NOT the same thing as conscious states/experiences.

And contrary to what Matt was asserting, mental experiences are in fact conscious Ockham's razorexperiences. It’s a tautology. Yet at one point he claimed that he was talking about experiences and not consciousness, which I just pointed out are exactly the same thing. So clearly these are not physical things. Thus Ockhams razor would point out the ad hoc explanations and inadequacy of physicalism to account for these things and substance dualism would stand. So its not about which theory has the fewest assumptions but rather which theory holds the best explanation, has better explanatory power and which theory fits all the data.

Thank you again. I really did enjoy hearing your feedback.

-Eric Hernandez

For those interested in a longer review of the debate, download the free podcast interview on the Sin Boldly Podcast, episode 22.

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