Just a small quibble and based on other comments you've made I know you grok this, but the IU is based on reality.
It's forged against reality, it just doesn't veridically represent reality.
So the question is to what extent do our perceptual and conceptual representations depart from reality?
Of course if the above is true it means the question is based on non-veridical perceptions and conceptions about reality and therefore may be absurd.
Do you mean 'absurd' in the existentialist sense? Here is a brief (and thus oversimplified) characterization of the way in which existentialist philosophers use the term:
"
Existentialism is a philosophy that emphasizes
individual existence,
freedom and
choice. It is the view that humans
define their own meaning in life, and try to make
rational decisions despite existing in an
irrational universe. It focuses on the question of
human existence, and the feeling that there is
no purpose or
explanation at the core of existence. It holds that, as there is
no God or any other
transcendent force, the only way to
counter this nothingness (and hence to find
meaning in life) is by
embracing existence.
Thus, Existentialism believes that individuals are
entirely free* [see *below] and must take
personal responsibility for themselves (although with this responsibility comes
angst, a profound anguish or dread). It therefore emphasizes
action,
freedom and
decision as fundamental, and holds that the only way to rise above the essentially
absurd condition of humanity (which is characterized by
suffering and
inevitable death) is by exercising our personal
freedom and choice (a complete rejection of
Determinism).
Often,
Existentialism as a movement is used to describe those who refuse to belong to
any school of thought, repudiating of the
adequacy of any body of beliefs or systems, claiming them to be superficial, academic and remote from life.
Although it has much in common with Nihilism, Existentialism is more a reaction against traditional philosophies, such as Rationalism, Empiricism and Positivism, that seek to discover an ultimate order and universal meaning in metaphysical principles or in the structure of the observed world. It asserts that people actually make decisions based on what has meaning to them, rather than what is rational.
Existentialism
originated with the 19th Century philosophers
Søren Kierkegaard and
Friedrich Nietzsche, although neither used the
term in their work. In the 1940s and 1950s, French existentialists such as
Jean-Paul Sartre,
Albert Camus (1913 - 1960), and
Simone de Beauvoir (1908 - 1986) wrote scholarly and fictional works that popularized
existential themes, such as dread, boredom, alienation, the absurd, freedom, commitment and nothingness."
Existentialism - By Branch / Doctrine - The Basics of Philosophy
Note: *"entirely free" is a mistatement of the development in existential philosophy [in Sartre, Bouvoir, Camus, Merleau-Ponty, Levinas, and others] toward an understanding of the freedom of individuals as always
'situated', its range and extent qualified or constrained by what is possible within one's actual situation in his or her lived world. Even within chains of physical imprisonment or reductive definitions of the individual projected on oneself (or on one's social/racial/gendered group by others), transcendence of one's objectified situation is possible by the attitude one takes, the inner revolt one can maintain and act upon, against this intended objectification.
The question your post raises for me is whether -- and how -- we can understand Hoffman's UI theory as 'absurd' in an existentialist sense. I think we can do so on the basis that Hoffman seems to deny that existentially conscious beings such as ourselves can understand enough about ourselves and our lived 'world' -- as we can think it within and speculate on it beyond the horizons of visibility -- to differentiate between meaning accessible within our own situated existences and a possible unified meaning of all being beyond our grasp. And yet, as Steve has suggested, Hoffman sees himself as capable of moving outside of the situated meaning attainable by human existents to define the entire/universal nature of being in informational/computational terms. I see Hoffman's claims about the 'UI' as a wild surmise that the informational/computational meme can explain [and radically reduce] the nature of human consciousness and mind. You go on to write:
But can we have our cake and eat it too, Dennett does: this this and this are phenomena but this this and this are noumena.
The above model may be wrong. And if it is we are confronted with even harder questions! If we do perceive and think about reality veridically how might that be?
For those who adopt the materialist, reductionist, mechanistic, determined worldview, why should (and it must be should, right?) reality have ticktocked to a point of perfect self-awareness?
On what grounds can it be said that
"for those who adopt the materialist, reductionist, mechanistic, determined worldview, why should (and it must be should, right?) reality have ticktocked to a point of perfect self-awareness?"
What and whose tenable 'perfect self-awareness' do you have in mind as resulting from a 'determined worldview'?
You add:
That seems quite odd, no?
So which is it: We do and can know nothing or we do and can know all?"
Why must it be either/or? Our perceptions and experiences can be both veridical [actual] within the local world we exist in and yet limited regarding the nature of all-that-is in the world/universe/cosmos of which our being is part, about which we have learned some things that we can and do call facts (at least temporarily). The meaning we find in our own existences, individually and together, is not dispensable if we wish to understand our own nature as embodied consciousness, embedded and enactive in the temporal world whose being, like our own, is temporal.
As to the nature and possible meaning of Being as a whole, our only access to it must be through our own experience in be-ing, which is the ground of what we can think abstractly. It seems to me that our species' thinking about being has become short-circuited as a result of Kant's distinction between the categories of 'the noumenal' and 'the phenomenal'. Philosophers still struggle to understand the relation between the 'noumenal' and the 'phenomenal', assuming that they/we have no access to the noumenal. One might call that an absurd task. But what if the noumenal and the phenomenal interpenetrate one another? Shouldn't we pursue the analysis of human experiences in which this interpenetration has been sensed?