Pondering Truth

When we speak of “truth” do we describe some single entity or quality in the world?  Or is “truth” hypostasized to simplify a complex of relationships between the inner and outer worlds that we do not (cannot?) understand?

Is “truth” an operational concept?  There is no operational difference “now” between a justified belief and a justified true belief (a.k.a. “knowledge”, at least in many philosophers’ systems).  I make the same choices, take the same actions either way.  But there may be an effect on the outcome (or not).  Is “truth” operational in evaluating outcomes, and therefore, perhaps improving the reasons for future beliefs?

Even in evaluating the outcome of past choices, I still don’t “possess truth”.  I only formulate, and attempt to justify, further beliefs (e.g., beliefs about my past beliefs).  In Dewey’s terminology from Experience and Nature, truth does not seem to be something we can “have directly”.

There is a state of the world, and there is a state of my mind (or yours), which is, itself, part of the state of the world.  The state of my mind includes a simplified, impressionistic “image” (in some neural/synaptic medium) of the state of the world – to the extent it is accessible to my imagination.  In that image, the state of my mind figures under such rubrics as “reasons” and “beliefs”.  Based on my state of mind (at any given time), I will make certain choices, and take certain actions.  Partly because of such actions, at some future time the state of the world, and the state of my mind, will be different.  By comparing the current state of my mind (and especially its world-image) to my memory of its prior state, I make judgments about the truth of my previously held beliefs.  I formulate (reasoned) beliefs about my prior beliefs.

Is “truth”, then, just something we invent to explain our relative satisfaction or dissatisfaction with the outcomes of our past endeavors?  The trouble with that idea is that our feeling of satisfaction may be connected to aspects of the outcome which some mythical unbiased observer would be unwilling to call “truth”.  For instance, a racist may desire to join an organization of like-minded individuals.  His belief that African Americans are genetically inferior to “Aryans” may help him in that endeavor, and thereby lead him to be satisfied, but we would not want to call his belief “true” on such grounds.  Then there is the growing body of psychological research indicating that our brains have evolved so as to readily adopt certain beliefs which are adaptive, but not (necessarily) “true”.  An example is the “confirmation bias”, where by our minds tend to disproportionally accept data that confirms what we want to believe, and reject data that disconfirms it.  Another example is the “hyperactive agent detection” that Daniel Dennett discusses in Breaking the Spell (among other places).  Other examples can be found in various papers in Naturalizing Epistemology (Hilary Kornblith, ed.)

It seems there is something actual about the relationship between our mental states and the world state that we are trying to capture with the concept “truth”, which is related to, but not simply reducible to, our degree of satisfaction with outcomes.  I admit, at this point in my life, to be still wondering (persistently) about exactly what it is.

Postscript on Confirmation.  As with many of the musings on Persistent Wondering, this one pretty much starts “where I am” and doesn’t make much of an effort to relate to an audience that may not be starting at the same place.  I apologize for that… but after all, I am portraying myself as a “wonderer”, and making no claims to be a teacher.  (Lame excuse.)

In this essay in particular, though, it seems to me that many people may wonder why I would feel – at all – that “truth” is not directly accessible.  In many (most?) of our everyday interactions with the world, confirmation of our beliefs is direct and immediate, and seems incontrovertible.  I believe I left my keys on the kitchen counter.  I go downstairs – I either find them there, or I do not.

Other “facts” are not so easily confirmed or disconfirmed, though.  There are the challenges of philosophical skepticism.  How do I know I am not dreaming?  Or hallucinating?  Or a disembodied brain kept alive in a vat, with my neural inputs manipulated by alien scientists?  Then there is the question of “modeling”.  Complex physical or social systems cannot be grasped by our minds in their complete and detailed totality.  We need to abstract from them, simplify them, in order to understand them.  Do concepts like race, class, culture, the national income “truly” conform to some real world objects, and if so exactly what and how?  How do we indubitably confirm or disconfirm them?  Theoretical physics provides examples, also.  Do the objects of modern theoretical physics – quarks, bosons, photons – “really” exist, or are they just a convenient (not necessarily unique) way of mathematizing experimental results?  Are the relatively abstract and indirect confirmations of physics experiments really of the same class as our confirming (by looking) that our keys are on the counter?

But really, ALL of our knowledge involves some such modeling (abstraction and analysis).  All the objects we conceive involve some level of abstraction – focusing on certain aspects of experience and ignoring others.  Something of this is suggested by Heraclitus’s statement thousands of years ago that “You can never step into the same river twice.”  What exactly is a river?  Is it the specific water molecules?  But they start out in a glacier and end up in the ocean.  Is it the banks?  But they shift with time as soil particles are removed and deposited.  Is it some abstract (fractal?) pattern that encompasses changes over time?  What is the “truth” of the matter?

Our mental states (beliefs and so on) consist in synaptic patterns, roughly, stable-yet-changing patterns of chemical interactions between neurons.  The state of the world consists in the interplay of forces amongst patterned matter and energy, extending strongly or weakly between the various points of the entire universe.  It is not clear that some unique and transparent correspondence can be established between those two things and unambiguously labeled “truth”.  On a conceptual, theoretical level, the question of the truth of our beliefs, their confirmation or disconfirmation, is not at all a trivial one.  Although on the pragmatic level of day-to-day actions, it very often is.

Similarity and Natural Kinds

Preface:  I’ve been reading “Naturalizing Epistemology” by Hilary Kornblith, Ed., which reprints a couple of papers by W.V.O. Quine, “Epistemology Naturalized” and “Natural Kinds”, along with papers by others that relate to questions raised by Quine in those essays, or raised by others in response to those essays.  The present post was inspired by ideas in the first few essays in that book.

“Similarity”, I think, arises from replaceability.  Two objects are similar to the degree to which you could replace one with the other without salient change in the state-of-affairs under analysis.  Obviously “salient” and even “change” are terms in need of further analysis.

Perceptually, we have “hardwired” (innate) and “softwired” (learned) structures in our brains (primarily – with some functionality distributed elsewhere in our somas) to identify different kinds of similarity.  Hardwired structures include things like edge detectors and angle detectors.  Softwired structures are built up from such.  Questions that can be asked include:  How would such features have come to evolve?  Why are they so apparently efficacious?  Just how reliably efficacious are they?

The nature of organisms suggests categorization of environmental factors on the basis of their effects on the organism.  Some factors encourage growth or reproduction.  Some limit these or produce death or extinction.  With complex organisms, some factors have these effects on a part of the organism, only, and may have very different effects (or little effect, at all) on other parts – stimulating production of this hormone, while retarding production of that, for example.  Replaceability of these factors with respect to their organic effects is the basis of categorization, and the source of similarity.  The salience of change can be suitably quantified in each case (e.g., rate of cell reproduction or hormone production).

Since they derive from our interactions with the world, our categories and sense of similarity relate closely to the world.  But there is still an element of subjectivity.  All categories are relative to an analysis.  Some categories may be relatively stable across all conceivable analyses we may do.  These we tend to characterize as “natural kinds”.  But even natural kinds such as species can have fuzzy edges for certain analyses.  (Exactly where, on the evolutionary tree, does a particular species begin?)  An intelligence arising from a very different history (a silicon-based life form, say, or a spontaneously evolving “artificial” intelligence) might cleave the world very differently than we do.  But in some categories (mineralogy, biological lineages) if it made an analysis at all, there would probably be considerable correspondence with our own.  Natural kinds are not meaningless, nor arbitrary, but neither are they perfectly precise.

The Mulder Argument

The essence of mystical/magical/religious thinking, that which distinguishes it from truly philosophical thinking, may well be something that could be termed “the Mulder Argument” (after fictional FBI agent Fox Mulder on the television show “The X-Files”).  This argument is given in four words: “I want to believe.”  I’ve run across this argument in many forms.  Once, when I had backed a theist who thought she could prove the existence of her God completely into a corner, she escaped by saying, “I just can’t accept a world like that.”  Others, asked to provide any sort of justification for their claims fall back on, “I just know.”  Philosophical thinking, on the other hand, must be much more ruthless than this.  If philosophy is “love of wisdom”, than you must love it wherever it leads you.  If you don’t like the direction, learn to live with it.  I summed this up to myself, years ago, in a epiphany which I worded as: “My desires are not probative.”

Since it is very central to my view of the world that all important traits of organisms can be explained by evolution by natural selection, I have had some concerns over the question:  “How could such a false argument become so ubiquitous in the human species?”  Isn’t a trait counter-adaptive if it consistently leads one to believe things that are false?  I think I’ve finally come at an answer to these questions, and come at it through another puzzle, specifically, through trying to reconcile my own principle of the non-evidentiary nature of desire with a premise given at various places in Marx and Gramsci, vis. the philosophy of praxis, which states quite the opposite, i.e., that reality is made by humans, especially acting socially, and that in this sense, the desire, or more precisely the will, is in fact probative.

I think it all boils down to taking the correct domain for each argument.  Reality is not something that is taken passively by organisms, but is something dynamically modified by them in the course of their existence.  This is a very important insight.  Organisms alter their “environment” just as much as the environment causes modifications in organisms.  In this sense, for a thinking organism like a human, believing in something can often be instrumental to its being so.  But there are limitations on this principle.  If I believe that I will change the government, then perhaps I can.  But if I believe I can literally move mountains with my mind, or with prayer, then that will not happen.  I will have to add a liberal quantity of muscle, time and the application of earth-moving equipment to my faith, if I want to bring this result about. 

Human minds have evolved to be capable of rational thinking, but it is by no means assured that all thinking that goes on therein will be rational.  If I believe that I will change the government, or find food, or win a fight, or find a wife, then perhaps I will.  If I believe that I cannot, then certainly I will not.  It would be more rational to believe that “maybe I can, if I try hard enough,” rather than simply “I will,” but the more rational belief is more complex, and more susceptible to doubt, and may therefore be inferior to the simple (if less correct) version in many matters of practical success or survival, i.e., matters directly susceptible to natural selection.  This would be enough for evolution to select for a tendency to find your desires probative.  In order to be equally efficacious, in many practical life matters, as the irrational belief, the rational belief would have to be combined with an iron determination.  Iron logic and iron determination may be a more admirable combination than sloppy thinking and blind faith, but it is perhaps a more difficult combination for random mutation to generate.  As for the cases in which blind faith leads to an incorrect judgment, well, believing in God or not believing may in general have far less effect on the existence or non-existence of your posterity than whether or not you believe you will successfully woo your wife.

Note that I am not saying that there is a “gene” for the Mulder Argument.  I am just saying that a predilection for believing what you want to be true, however complexly coded in genes, memes and individual experience, may in general lead to some differential reproductive success.

But none of this makes blind faith a rational argument for deducing the nature of things as they are, as opposed to (within a limited domain) things as they will be.  The will to believe probably yields even more success if it is tempered with a realistic appraisal of when to apply it and when not to (and, just possibly, when it really makes no difference one way or the other).  This is essentially what Gramsci was trying to get at with his oft-cited “pessimism of the intellect; optimism of the will.”  Despite the theological overtones, this same insight is reflected in a quotation popular within another tradition I’ve had some exposure to:  “Oh Lord, give me the serenity to accept the things I cannot change [including the evidence of your own non-existence!], the courage to change the things I can, and the wisdom to know the difference.”