To Imagist - I disagree that "red" is descriptive of a certain frequency range of visible light. It is descriptive of a experience that we have. We experience red just as we experience the smell of a pineapple. Yes, the chemicals a pineapple emits are material objects. The receptors in our nose are material objects. The electrical impulses sent to our brains are material objects. But the phenomenon of the mind that we refer to as the smell of a pineapple is not a material object. A pineapple smells like a pineapple but I cannot impart the smell of a pineapple to you if you have never experienced it for yourself. "How a pineapple smells to me" is an example of what some philosophers call "qualia". This is a weird word to define, as you can imagine. But in philosophy qualia are "subjective experiences" and they are as real to me, at least, as rocks. And these sensory experiences are of course at the base level of all experiences of the mind.
Okay, so you're choosing "red, the experience", rather than "red, the description of a phenomenon". That's fine, we can go with your definition.
You haven't established exactly how this relates to the existence of a god, but I think I can guess.
If you are asserting that god is a qualia, then I would have to agree that god exists, but only by that extremely limited definition. I have yet to find a theist who attributed god only with being a sensory experience. Theists almost universally attribute god with at least having a mind or having done something.
Try to pull a materialistic understanding of music, language or geometry out of your hat and I will be impressed.
Music, language, and geometry aren't qualia. Music is sort of a group of qualia, and nobody can really agree what belongs in that group (some people think rap isn't music, for example).
Language and geometry aren't experiences; they are systems of expressing ideas (I would argue that geometry is a language). Again, language and geometry have a defined existence rather than an absolute existence as evidenced by the various languages of the world or the differing systems of Euclidean and non-Euclidean geometry.
I'm new here but I've learned you folks like to keep threads on track. So getting back to the theme of the thread, the point I'm trying to make is that the underlying assertion of many of the atheist's posts here that the material world is all there is may well be true, and I as an individual may even be drawn to the notion, as an agnostic I acknowledge that this assertion does not hold a high level of certainty. If you look up the wiki entry for "qualia", for example, you will see the level of disagreement (and perhaps understand why I'm not that keen on participating in a debate about cognitive phenomenon). Suffice it to say that given our extremely poor objective scientific understanding of the mind - and even the most hard core scientific researchers readily admit to this - I'm not personally ready to declare our experiences as purely manifestations of natural phenomenon just because it fits in neatly with everything else we know about the objective world. Apart from the intellectual failing this represents to me, it also has troubling consequences such as the value of life and the existence of free will.
To a very general idea of god I am agnostic, and I do believe that such a thing
could exist. However, the fact that the materialist idea of the world "fits in neatly with everything else we know about the objective world" gives it a very high probability, in contrast with the non-evident concept of god.
Also, these troubling consequences you speak of have no bearing on what is actually true. The truth is sometimes uncomfortable.
I think it is a mistake to extend our confidence derived from successes in understanding the objective world to that of our internal life. I think our scientific understanding of what is is "to be' will forever remain out of our grasp. Like a snake nibbling at it's own tail, thinking it may be possible to swallow itself whole.
So what alternative do you propose? Our understanding of the objective world is the only understanding we can claim to have.
A wonderful mystery there for us to savor. Not a meaningless collection of matter and energy to be sacrificed at the alter of reason.
Why do you think that a materialist worldview removes meaning from our "qualia"? I just ate a very excellent sandwich. My belief that the sandwich is 100% matter/energy and that my experience of it is only through the electrochemical processes of my nervous system in no way diminishes the deliciousness of its taste. In fact, as I write this, I think I will make myself another sandwich.