davidsmith,
If you are actually capable of honestly answering "yes", then clearly those supposedly non-physical properties have had some affect on your brain. Without any such effects, the truth of the fact that they had different non-physical properties could not possibly have influenced your behavior of saying that they do.
Why does blueness have to have an effect on my brain in order for me to say something about it? I think this is the assumption you are making that is not necessarily true. And if it isn't true then your argument doesn't carry any weight.
I just explained why. Your brain is what makes you talk. Or are you claiming that even if these supposedly causally inefficacious properties
didn't exist, that you would talk and behave as though they did anyway?
If so, then that simply doesn't make any sense. We know that the brain is involved both in the processes of thinking and remembering. If these properties don't affect your brain, then you would be unable to remember having had them an instant before, and unable actually process any information about them. Not only would your
behavior of verabally answering that there was a difference not actually be dependent on there actually being a difference, but you would not even be able to remember that they did!
But of course, this is not the case. You do remember having had these supposedly causally inefficacious properties in the past. And those memories are stored physically in your brain. Therefore whatever it is that you remember having had, it clearly is
not causally inefficacious.
Only if you assume that non-physical existence must affect my brain in order for me to refer to it.
It's not a question of you being able to
refer to it. For that matter, you can refer to things that don't even exist. The problem is that if it is really causally inefficacious, then none of your beliefs about it actually have anything to with it. Those beliefs are purely the result of causally efficacious things which these causally inefficacious properties can not possibly have affected.
Likewise, any properties which you find you actually
are capable of remembering having, and capable of thinking about, clearly
are causally efficacious.
I can define property X to be causally inefficacious, and then refer to it. But what I am referring to is not anything I am actually aware of having. If I define property X to some property which I actually remember having, then that property has affected my memories, and therefore must be causally efficacious.
The problem with this whole idea of epiphenomenalism is that it is based on the false notion that things like thinking and remembering are performed by something distinct from the brain, which then somehow controls the brain (and thus your behavior). This simply is not the case. Thinking and remembering cannot be separated out from brain activity. Even if you hold out for the unlikely possibility that there is something
more than just brain activity to these things, the idea that the brain is not what actually stores and operates on information, is not compatible with reality.
And that is the central point here. Your brain is what processes and stores information. If you believe something, then that belief is physicall encoded in your brain. If you conclude, through some process of thought, that your belief is justified, then that information was processed by your brain.
Ian,
To put it formally in my own words. My own comments are in blue:
Premise 1: Consciousness is non-physical
Premise 2: One is directly aware of ones own consciousness
Premise 3: Ones direct awareness of ones consciousness necessarily affects the brain.
Conclusion 1: Consciousness does not affect your brain in any way. This follows directly from the fact that it is non-physical.
Of course people should be aware that I do say consciousness is causally efficacious. But what Dr Cat is saying here is that from my definition of consciousness (subjective qualitative feelings) the causal power of consciousness is not consciousness itself. And this is precisely what we're considering; namely consciousness itself in abstraction from any causal powers it has.
You have clearly misunderstood my argument. I
specifically stated as my first premise that consciousness has a non-physical property, rather than that it is non-physical, precisely because I
do recognize that you believe that consciousness is causally efficacious.
When you say that "consciousness itself, in abstraction from any causal powers it has", you are talking about the non-physical properties of consciousness. That is the whole point. If after taking away the causal powers of consciousness, you actually have anything left at all, then what you have left are precisely the non-physical properties of consciousness. That is, the properties of consciousness which do not affect anything physical (including your brain).
In other words we have the trivial claim:
Consciousness shorn of its causal powers does not have any causal powers!
The conclusion of my argument is that consciousness shorn of its causal powers is
nothing at all.
So let's consider the general case. We have X which has causal powers. But Dr Cat is saying lets abstract X from its causal powers i.e consider each separately.
We are then left with the rather trivial claim that X considered in abstraction from its causal powers does not have any causal powers. But if something has no causal powers whatsoever, then how can we ever know of its existence?? Thus we have absolutely no reason to suppose X exists. Therefore only X's causal powers exist. Except that since X does not exist we only have certain physical processes in the world which could be designated "X" -- and of course "X" is then quite different from X.
Huh? I was with you up until the italicized part. What do you mean "since X does not exist"? Of course X exists! If X has causal powers it
must exist. The question is whether there is anything more to X than its causal powers.
The same goes for consciousness. First of all abstract consciousness from its causal powers. Thus consciousness in abstraction from its causal powers has no causal powers. Therefore, since it is unable to affect the world, we can never know of its existence. Thus only the causal powers of consciousness exist; or in other words only certain physical processes in the world exist -- namely our behaviour (there is nothing called consciousness which causes behaviour).
This does not follow from the above at all. On the contrary, since we have established that consciousness
does have causal powers, clearly there
is something called consciousness which causes our behavior. There is just nothing more to it than its causal powers.
Specifically, in the context of my position, consciousness is a set of brain processes. These brain processes cause our behavior, and like all physical things, there is nothing more to them than their causal powers. That is
not the same as saying that consciousness does not exist!
In other words Dr Cat is arguing that we are p-zombies (unconscious automatons).
If you define a p-zombie to be somebody who does not possess consciousness, then clearly we are not p-zombies. Furthermore, if you define a p-zombie to be somebody who is physically identical to a human, but who does not possess consciousness, then such a thing is clearly impossible since consciousness is non-physical.
If, on the other hand, you define a p-zombie to be somebody whose consciousness has no causally inefficacious properties, then of course we are all p-zombies. But such a definition is rather pointless, since this would mean that humans and p-zombies are exactly the same thing.
But since we know absolutely that we are conscious (i.e we cannot possibly be in error in this), we have a paradox. At least either that or Dr Cat's argument is in error.
The only error is your completely illogical leap from "consciousness exists, but consists only of its causal powers" to "consciousness does not exist". Not only does this not follow, but the latter flatly contradicts the former.
The fact is that while we know absolutely that we are conscious, we do not, by any stretch of the imagination, know that our consciousness consists of anything more than its causal powers. On the contrary, as I have already explained, its causal powers are the only part of it we possibly
could be aware of having, which implies from the definition of "consciousness" that it can only consist of causal powers.
There are 2 mistakes as I see it. The 2nd one being conclusive.
First of all it might ring mighty strange to people to conclude X has no causal powers by considering it in abstraction from its causal powers in the first place!.
Then why on Earth did you do so? I certainly didn't. Nowhere in any of my arguments have I concluded that consciousness has no causal powers.
But lets leave aside this objection. Dr Cat is saying we only know of our consciousness through its causal powers. But as I have repeated stated, non-materialists reject this thesis.
You can only reject it by burying your head in the sand and completely ignoring what we know about the brain's involvment in thinking and remembering.
When we say we know we are conscious, we are not saying that consciousness causes some other process whereby we come to know it. No, we are saying that our recognition of our our consciousness is unmediated. In other words there is no causal relationship between the fact of my consciousness and me knowing it.
This again contradicts everything we know about the brain's involvement in thinking and remembering.
The fact that I might say I know I am conscious does not mean I could not logically know it without saying it. Indeed it does not mean that I could not know it without any brain activity whatsoever. Of course it may be nomonologically necessary that there will be brain activity whenever I think anything at all, but since my position is that the appropriate brain activity follows consciousness, rather than vice versa, then Dr Cat's argument doesn't hold.
The problem is that your position requires that the brain processes must follow you
knowing that you have consciousness. That your brain processes are not actually involved in the processes of thinking or remembering at all, but instead are simply controlled by your "consciousness" to cause your bodily behavior. This position simply is not compatible with reality.
I am afraid if you are not going to accept the basic fact that all information processing and storage aspects of consciousness (if not all of consciousness itself) are performed by the brain, then we are never going to get anywhere.
Dr. Stupid