The UMSITW concept asserts that subjective awareness is what it is like to be the proceess of Updating the Model of Self-In-The-World which has been created within the brain of each individual. The model exists and the continual updating of it occurs as a primary survival mechanism of the individual.
The model constitutes a navigational device by means of which the self - as a living body in the first instance - keeps track of where it is within its physical and social environments. The individual is able to compare outcomes of behaviour with what was planned or predicted, assess any discrepancies, and amend current movement plans or other expectations where necessary.
A key component of this theory is that subjectivity - ie an awareness of being, however rudimentary - arises from a reflexive process in which:
The component elements of the model of self in the world - and indeed all mental contents - are embodied by dynamic logical structures (DLS) within the brain. These, when active, constitute embodiments of relevant information *about* the respective something or other in the world or of the self of the individual *and* have transitive effect within the brain. This means that they affect other DLS in relevant ways and/or cause bodily behaviour by making muscles move in the right way at the right time.
DLS, when active, exist explicitly as the patterns of interactions amongst coalitions of many, separate and distinct, groups of cortical neurons and other neuron groups in other, near by, regions of the CNS. Whilst active, DLS are stustained through mutual reciprocal signaling between member groups via 're-entrant' white-matter pathways.
A key feature of DLS is that the mutual reciprocal signalling between what may be very widely separated local cortical sub-groups (AKA trans-cortical columns or "mini columns") entails resonance. IE, patterns of stimulation and inhibition occur as bursts and waves of depolarisations (impulses) so that the wave type properties of superimposition result in resonances and interference patterns. (As such it would be extremely rare if not impossible for a single impulse to trigger anything significant.) This intrinsic temporal structure combines with the cortical and other regional localisations to endow each DLS with its meaning content.
NB: it is the intrinsic wave motion property of DLS whch binds each of them into an effective unity. (Which of course is the reason this camp is sited under Wave Theory of Consciousness.) It is also a primary part of the reason why human memory is content addressable.
When inactive, DLS subsist implicitly as the changes to the synapses and dendritic layouts of neuron members of the coalition which became epigenetically consolidated during sleep periods following the first eruption of each respective DLS coalition. These neuron structural changes are what allow each quiescent DLS to be evoked if/when sufficient members of the coalition are stimulated at the same time.
DLS exist and affect the rest of the world, and we have good reason for assuming they can and do represent or embody any thought that has occurred to a human being on Earth.
UMSITW is fairly compatibe with David Chalmers' Functional Computational Equivalence idea but requires that "functional" really mean what it says. In other words, all discussion of ineffability notwithstanding, the effective outcome is what counts so that similar inputs - physical experience - will result in the same outputs/behaviours and the same, spontaneous, reports of personal subjectivity.
The fact that DLS create UMSITW is also very compatible with the Detect, React, and Associate camp.
A key point about this is that the model (UMSITW) exists. Therefore there is something that "it is like to be it!" One way to understand this idea is as a bridge between the synthetic a priori truth of awareness of one's own existence and the mind-boggling reality of Steven Lehar’s observation that: Just beyond the things you see and hear ..... is the inside surface of your skull!
Philosophical mind games, of which the most extreme are the mathematical ontologies of Max Tegmark and Bruno Marchal, and popular sci-fi as exemplified in movies such as the "Matrix" trilogy or "The Thirteenth Floor", all tend to assume that complete emulation is possible in principle. UMSITW however holds that the essence of what is subjectively reported as consciousness is what-it-is-like-to-be the model of self in the world, or more specifically the updating of the model. That is to say the *quality* of the experience is precisely what it is like to be the (updating of) the model of the moment.
Matrix-like theories suffer from a burden of proof concerning the belief that all aspects of what is occurring within a human brain "can" be modelled within an alternative computational system. Statements to this effect are assertions of faith only and all rest on beliefs that such modelling can surmount the limitations of digital algorithms attempting to emulate analogue processes, for example:
(A good analogy for the interaction of all the little ion channel currents with the electromagnetic fields is the mutual interaction of small scale vibrations in domestic water valves and the large scale resonances of the piping.)
The updating model within the brain is limited by its medium and any of it's "emulations" will be limited even more so.
For those of us with a sense of humour it is worth meditating now and again on the likely dimensions of any system intended to emulate one or more human minds. Conceivably gravitational collapse and implosion would be the greatest limiting factor due to the sheer size of the processing system needed!
From a practical point of view it is highly unlikely there will ever be any real emulations of the human mind, but there almost certainly will be some very creative artificial intelligences coming into being in future. Maybe there will be millions of them or maybe just one in each self sustaining ecological/economic community. However this may be, they will not be human minds but they will surely demand, and get, to vote due to our dependence on them and theirs upon us!