Wyman;
You ask interesting questions. I will admit that I know nothing about epiphenomenalism or dual aspect theory, so I waited for others to respond in order to figure out what was being discussed. But I do know a little about consciousness. Please consider my following thoughts:
Wyman wrote:As for Epiphenomenalism, I see the distinguishing characteristic of ep(it's such an obnoxious word, it needs abbreviation) is not so much that the brain causes consciousness, but that consciousness, in turn, has no causal efficacy whatsoever. The causation is a one way street.
This is necessary. If science stated that the mental affects the physical, then they would be admitting to the possibility of "God" and opening the doors to religious interpretations. They would never willingly do that even if reality dictated it.
So the materialist views on this issue has led to some crazy ideas. Some try to deny subjectivity altogether, except mine, which leads to solipsism -- and the mental wins. Some try to say that all things have a mental and physical quality, which leads to ideas that everything is alive -- including the Universe, which leads back to "God" ideas. Lately they have been trying to prove that the mental does not actually exist, that it is just illusion. The brain is the producer of consciousness, so when we die, there is no consciousness -- that makes science the winner!
So most of these theories are just a game of trying to prove "Who's the Boss?" between science and religion. The motivations behind these theories make me distrust them, and beside that, religion is talking about "God", science is talking about the brain, and no one is discussing consciousness.
Wyman wrote:That the brain causes consciousness is fairly uncontroversial (except to certain spiritual types). The brain is a platform for consciousness, as Imp points out.
But Imp is wrong for the following reason: All life is sentient. This is not disputed by science or philosophy. Sentient means that life can sense it's surroundings, so it is aware of it's environment. Being aware of it's environment means that it is conscious of it's environment. All life possesses some consciousness -- yes, that means trees and crabgrass. All life forms do not have a brain.
If you want some circular thinking, consider this: The human brain produces consciousness; our consciousness then anthropomorphises "God"; "God" then creates the heavens and the Earth; life evolves on the Earth and eventually produces humans; then our brains produce consciousness so we can create "God". It's a cycle!! (chuckle)
I don't often agree with Henry Quirk, but his following statement was the first to "nail" the issue in this thread.
Henry wrote:Seems to me: mind (a recursive process) only happens in material of a particular composition and complexity (a brain embedded in a body).
As Henry notes, we are talking about "mind", not consciousness. So aren't mind and consciousness the same things? Well, I don't know, are you willing to state that daffodils and crabgrass have minds? They are conscious.
The immune system in your body has the ability to recognize an alien intruder, remember past intruders, compare the past experiences to the new intruder, and plan an attack to dispose of the new intruder. This is why vaccines work. So the immune system is aware, knows, remembers, and learns -- does this mean that it has a mind? Every cell in our bodies is aware, so do they all have mind?
Either we agree that mind and consciousness are the same thing, which means that every cell in every life form possesses mind; or we say that mind and consciousness are different things, which means that consciousness is not produced by the brain -- the conscious rational aspect of mind may be produced by the brain. Any other explanation leads to the circular thinking that I noted above.
So I don't think that the above theories are about consciousness at all. They are mostly designed to prove "Who's the Boss?" Science's ideas of mind, or religion's ideas of soul. same same
Wyman wrote:From here, I get confused. Do they think consciousness is 'not physical' or 'physical'? What does 'physical' mean here? Are they dualists?
No idea of what they think. I think that consciousness has properties and reacts to temperature, water, chemistry, and something to do with magnetic fields (I don't understand magnetic fields, but there have been studies). So I am voting that it is physical, or at least some degrees of it are physical.
G
PS Greylorn has some good ideas on consciousness and is a source for original thinking, so don't mind his initial reaction. He is a lot like a mad dog and always snarls and barks until he gets to know you. (chuckle chuckle)