Saturday, July 24, 2010

A Somewhat Angsty Phenomenological Take on Reality

What is real? "Real" is that which imposes metaphysical order on all of our capacities (faculties) without our consent; and it is that which, furthermore, has the power to end our consciousness permanently.


I admit, it's not a terribly clear characterization.

Perhaps a simpler way to say it is, "From the personal perspective, the bare minimum of identifiably objective reality consists of that which is not amenable to change through our actions."

Still a problematic assertion. After all, I can never control another being's thoughts the way I can control my own--do we say that those thoughts are part of objective reality? Are their personal sensations a part as well?

I would say not, although the fact of their having those sensations is obviously an objective fact. It is the representational content of their sensations that may not map perfectly onto reality, e.g. when they are dreaming, imagining, or hallucinating. (That is to say, their experiences at a given moment may not be veridical.)

More confusingly, it might seem that we can change many things that we normally think of as objective. E.g., it is an objective fact that the brick wall over there is red (which we may translate to language that makes less use of second-order properties: "the wall over there reflects a majority of light with such and such a wavelength", for example). But, I can change that fact through my personal actions, by painting it green. So was it never an objective fact that the wall was red, after all?

Not exactly. I'm trying to get at something a little more fundamental. While it is true that you can change an object's color by painting it, you nevertheless cannot violate the laws of physics nor logic in doing so. With that in mind, what I'm saying seems to be this: the fundamental "building blocks" of reality, from a personal perspective, are impossibilities, which is to say, invariants.

Hmmm....

This is still a very problematic description.

Sunday, June 27, 2010

More About People Misjudging Themselves

The Philosopher's Eye reports:

Chances are, you will be a less reliable indicator of your own behavior than a brain scan will...

... [A] research team, led by Matthew Lieberman, a psychology professor at UCLA, had subjects watch a public service announcement about the benefits of sunscreen while in an fMRI machine. The researchers looked for an increase in activity of the medial prefrontal cortex, a part of the brain associated with values, preferences, and self-reflection. Then, the researchers asked the subjects how likely they were to use more sunscreen during the upcoming week. After one week, the subjects were asked how often they ended up using sunscreen.

What the researchers found was that the subjects who showed an increase in medial prefrontal cortex activity were 75% more likely to use sunscreen, whereas the subjects who self-reported the intention to use more sunscreen were only about 50% more likely to do so. Thus, the researchers had better information about how the subjects would behave during the upcoming weeks than the subjects themselves.
Here is a link to the original research (also found in the Philosopher's Eye page, of course.)

Monday, May 24, 2010

Thinking vs Acting

I still don't understand exactly the "internal" difference between doing and just..... thinking about doing. Imagining it.


If I now intend to make a physical action, such as wiggle one of my toes, there's something happening in my mind that precedes that action--an anticipatory "planning" or intention stage. (If I remember correctly, studies by Benjamin Libet suggest that we don't even become conscious of our brain's decision to initiate an action until some 200-500ms after our brain starts setting it in motion.) But I can think about wiggling a toe without actually doing it--in fact, that's what I'm doing now as I make these observations, and what you the reader will likely be doing as these words call forth involuntary recollections in your mind. I can imagine wiggling a toe, even. Since most of us are such visual creatures, this will probably be first and foremost a mentally created image of my own toe wiggling (somehow); as I add detail to the imagining, I can recall the other sensations that accompany such a feat: the quale of my toe shifting position, the accompanying movement of my skin, the small shifts in texture or whatever that my skin will register if my movement causes it to encounter new surfaces/objects, etc.

I can even try to mentally re-create (simulate) the very willing, or whatever it is, that causes genuine movement. I can do this at a somewhat intuitive level, I think, but I feel I have a very poor grasp on what is actually happening.

Now, the curious thing about my imaginings here, is that imagining itself is another type of action; so, while I'm tinkering with how my mind translates thought into action, I am meanwhile doing just that in order to "experiment" at all. (Proper scientists will be horrified to here such phenomenological investigation referred to as "experimentation", but hey, I'm not talking about proper scientific experiments in this context.)

It seems that there is always some kind of buffer or gap that I cannot quite cross here.




Saturday, February 6, 2010

Probably makes me laugh more than it ought to have

A parenthetical comment in a recent blog post from Ben Burgis:

Some friends of mine have this very nerdy running joke about starting a bar called "The Two Dogmas Of Alcoholism." We'd serve a shot called "The Analytic" and a shot called "The Synthetic" and both of them would be Jose Cuervo. When patrons had one of each and then asked what the difference was, the bar-tenders would all be trained to respond with, "ex-actly!"
I'd be a fan.

Monday, November 30, 2009

Opaque Introspection

Some time ago, Psyblog posted a series called "What Everyone Should Know About Their Own Minds". Appropriately enough, it covers different ways in which humans typically completely misunderstand (or misjudge) components of their own behavior such as motivations, reasons, and predictions about their own responses. Sometimes this involves resolving cognitive dissonance, where a subject changes some of her beliefs in order to better match other beliefs they had been opposing; other times the explanation is less clear.


The whole subject is a curious one, since, subjectively, most of us feel like we have pretty transparent access to the inside of our own heads. For example, if asked to give reasons why we find one face more attractive than another, we usually think we can do so so; and we feel moreover that the reasons we come up with will be true to whatever processes actually go on inside our heads. Not so, as one of the Psyblog posts reports; at least not with the accuracy that we'd think we would have.

My impression is that we are sometimes alien to our own minds, insofar as we don't understand most of our inner machinations. Yet, strangely, we have this need to "tell stories", even to ourselves, about why we've done things a particular way: a need for explanation or justification of our inner landscape, much in the fashion of the need that we have to explain (and understand) the outer world. This isn't such a bad thing, since seeking explanations is the heart of science (and rational inquiry). But it does emphasize the necessity of being relentlessly critical and skeptical if your aim is truth -- skeptical even about your own thought processes -- lest you settle too firmly on the first story that seems plausible to you.

A downside of the above skeptical strategy, in my own experience, is that it tends to drive you a little bit crazy. Constantly doubting your own motivations, values, judgments, and ostensible motivations is not a very enjoyable way to go about your day. After a certain point, if you lose too much faith in your own understanding with regard to the contents of your own head, you may end up impeding your own progress, due to constantly looking for nonexistent solid ground. From a practical "getting things done" standpoint, it may be better to be wrong about a few little details here and there if you're still able to function well in the main.

We may suppose, perhaps, that this was why we did not evolve to be more naturally self-critical and self-reflective creatures. Don't get me wrong, compared to any other form of intelligence that we know about, we still go pretty far toward it -- even the least reflective of individuals tries to purge logical inconsistencies from her thoughts, though the amount of tolerance for inconsistency obviously varies from person to person. But, based on experiments like those linked above, plausible-seeming beliefs about your own motivations were evolutionarily much more relevant to fitness than numerous safeguard mechanisms to ensure internal accuracy. Apparently.

Wednesday, November 11, 2009

Markram Speaks On Simulating the Brain



Henry Markram, director of the Blue Brain project, (relatively recently) gave a speech at TED about simulating neuron activity of the entire brain. This will require a supercomputer, in this case supplied by IBM, since the brain has some 1011 neurons. So far, they've replicated a rat's neocortical column, which comprises some 104 neurons, and Markram anticipates being able to fully model the human brain within 10 years.

One of the curious things that I found in the early part of his talk was how he kept saying "decisions" to refer to activity over which we have no direct control, such as the processing that goes into scaling object size based on distance. I'm not fond of that choice of words, since it seems to suggest that we, as conscious entities, could actually decide to perceive things differently from how we do -- something which should appeal to fans of neo-mystical idealism. For that reason, I think it would be better to avoid that kind of terminology to avoid a similar confusion as that which resulted from physicists' choice of the term "observe" to describe a particular type of interaction in quantum mechanics. They (physicists) also started the use of "God particle" to refer to the Higgs boson, which is again misleading to the general public, although I think the media has been more responsible for propagating that usage than any actual scientists.

Curious things, words.

Tuesday, November 10, 2009

Inquiry Into Impossibility

(Briefly).

I am a being with desires. Roughly, this means that I, as a sentient system, feel impelled to relieve an urge. So, I create a mental simulation of some thing, some state of affairs that differs from the current state of the world, that I expect (or hope) will alleviate that urge.
A simple example: Debra is hungry. Instinct and memory tell her that moving her body so as to bring comestibles to her mouth and chew (+ swallow, etc.) will make her less hungry. Thus, her object of desire is a state where she has eaten food, or where her stomach is full, or something to that effect.
The fundamental principle, as everyone already knows, is that actions modify our environment, and our bodies consequently reward us – with dopamine and the diminishment of urge – through modifying the environment in particular ways.

What happens, now, if I desire something impossible?

Let me sit and contemplate a bowl of fruit. My desire is for one of the fruit – a mango, perhaps – to be in my hand. I have, then, a clearly defined goal (a simulated aspect of the environment which will sate my want), and all that remains is to use the power of action to translate object of desire into actuality. Common sense says I should move myself within range of the bowl (if I'm not there already), extend an arm, and pick it up. However, my desire is slightly more complex than that: I want to achieve my goal without going through those steps. Part of my envisioned goal includes the condition that I collect the mango in the absence of gross physical movement.
There might be other options: maybe I have a friend (or servant) nearby who will interpret a very slight gesture on my part as a request for the mango. Or maybe there's a mechanical hand and conveyor belt set up that leads directly to my own biological hand, and it is activated through some minute action – moving my eyes or blinking in a particular pattern, for example.
But let's say none of these things have been arranged: the most likely situation is that I'm sitting in place alone, unaided, merely willing the mango to somehow appear in my hand through no great effort of my own.
That this should happen is improbable to the point of impossibility.
So, I review my options: supposing that I stubbornly stick to my original constraints (no gross physical movement), there is little to nothing that I can do to change the situation. To effect change, action is required; and only a particular subset of available actions leads to particular (desired) outcomes. If the set of actions-available-to-me happens to be disjoint to the set of actions-leading-to-my-goal, it seems I am utterly powerless. There must be overlap between those categories, otherwise it is logically impossible for me to achieve my goal through action.
Is there any other way to achieve a goal than through action? By the very nature of the word "achieve", I think the answer is no. Is it possible for me to accomplish something while doing nothing? Pace Laozi, the very idea reeks of contradiction. "But," I protest, "I am doing something – I'm thinking and simulating." The problem is that, apparently, thinking and simulating exert no influence on the universe if they are not accompanied by physical forces to realize their aims. Alone, they do not overlap with very many sets of actions-that-lead-to-goals at all.

How can I shape the universe to match my desires? Only through the channels that the universe allows me. And so the question becomes, how can I change those channels?