@fresco,
Its very simple. Can you show me in Heidegger where he rejects an ontic description of consciousness as being from the point of view of a body that is separated from what it is looking at? Or can you show me where he constrains what is looked at to being non-material?
You cannot give a materialist account of Being. A theoretical material model alone, absent consciousness, is not capable of even predicting the outcome of the most rudimentary experiments. The materialist model predicts something like a zombie world where no consciousness exists at all. A pure material world is not conscious. There is no physical law that predicts consciousness. If you read my posts carefully you will see that I said that we are conscious from the point of view of our bodies.
However, the fact that you cannot give a material account of Being does not mean that you cannot give a materialist account of nature. That account is contingent and a natural description. It depends on experiment to determine whether in fact it is true or false. Our universe is remarkably objective and materialist. Only in the relativity of time and in certain aspects of quantum mechanics does this objectivity break down somewhat and then not completely. These facts are natural facts of science not ontology.
Further it does not mean that this materialist view cannot then be turned round onto consciousness. That it can can be seen by just drinking a fifth of scotch and seeing what happens. Or taking a hit of LSD. It conditions a lot of our decisions. Why do you put a helmet on your kid when he plays ice hockey? Think about that. To say that this type of understanding is not useful is crazy. Rather, as Heidegger said, it is his philosophy which may not have a use but rather may be valuable not for what you can do with it but for what it does with you! Materialism is very useful and so is neurology. Let's hope we use it to become more aware of being not less.
Consciousness is not natural. A materialism is a description of nature not of consciousness. It is not in conflict with the ontology of Martin Heidegger because it is an ontic description of the experience we have.
Unfortunately I am traveling and don't have access to by books but if you can point out to me where Heidegger says that a materialist account of nature is impossible let me know. I don't right now believe it.
Either way though, it seems to me that the problem is that people interpret materialism as an ontology and then oppose it to what people like Heidegger are saying. But materialism is not an ontology - or should not be interpreted as one. Physics is a natural science not an ontology. I am not saying that the ontologies of a lot of physicists never get to an awareness of Being but remain as Sartre so well described or as Husserl did when he described the natural standpoint. Hell look at Searle. He is a naive realist and he is a philosopher! But that is not their science - this is their ontology. Their science is a natural science and deals with nature.
I am specifically using ontology in a way that predates its use in computer science and the way it is being used for example in the Stanford philosophy department. I am not talking about a list of objects when I say "ontology". I am talking about the study of Being as such.
Now the fact that you can interpret materialism ontologically is really interesting. Heidegger stated in I believe the Intro to Metaphysics that the access to the meaning of Being was gained by "thrusting aside your interpretive tendencies". Sartre stated in the introduction to Being and Nothingness - The Pursuit of Being that by the nihilating withdrawal of the the observer from the observed the meaning of being was "modified". Something like "Nothingness lies at the heart of being like a worm".
Now if you interpret that "nihilating withdrawl" in Satre's sense as "an interpretive tendency" in Heidegger's sense and you manage to actually stop it (why it is not easy to do so is a very interesting question but assume you do) then you gain access to the meaning of being in Heidegger's sense.
But also you get, according to Heidegger an epistemological reason for going with him. You get the fact that it is "as it is" "unmodified" and in that sense true. Therefore the nihilating withdrawal of the for-iteslf from the in-itself is a distortion the cessation of which is the key to understanding.
It is ultimately phenomenology applied to ontology. What is the alternative? To base ontology on something for which there is no epistemic basis? To define objective ontology as a possible mode of Dasein co-equal in its legitimacy? Perhaps that is possible. But it is not what Heidegger or Merleau-Ponty seem to me to be doing.
None of this, however has to do with the empirical sciences which determine the extent to which the world is material. It is to a large extent. That is a scientific fact. It is not an ontology.