• Christopher Tanner

Simplicity As Confirmation Bias

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For those philosophically minded, William Ockham will immediately engender various degrees of analytic glee, the name synonymous with logical parsimony or simple explanation. The more user-friendly phrase concerning parsimony is: “Don’t multiply entities beyond necessity.” Then again, perhaps the phrase isn’t as friendly as it may be to some. Thankfully that’s rather the point here, simplicity being, like beauty, in the eye of the beholder. Consider a rose possessed of a particular color and a certain number of petals arising out of a stem. To the average person it is a thing of beauty. To a botanist there will be an entire history of breeding involved. To a chemist there will be a litany of compounds and scents included. Which one is more simple? Is that even the right question? For Ockham, the answer to the latter is most certainly not.

As human beings, possessed of a surplus of intelligence and imagination, the need to offer explanations is not only a seeming necessity, but the source of a great deal of social fracas. Some of the earliest childhood memories are related to giving explanations for behavior in a manner to deflect guilt, as when explaining a broken window or why there’s chocolate on fingertips despite being told not to eat dessert before dinner. Such stories certainly continue into adulthood, though the ramifications of our explanations become exponentially more. Issues of social policy will take into account explanations for human behavior, the American justice system being predicated on the offering of behavior being intrinsically free. Matters of geopolitics rest on explanations of human interaction and the role force plays in building and maintaining countries. Environmental concerns run through the sieve of explanations concerning biological diversity and origins, including the age of the earth and the cosmos. None of the offered explanations for these matters come without consequences, often beginning during the battle of determining which explanation is better than another.

To understand the significance when one hears the term “explanation,” it can be helpful to immediately supplant it with “story” or “narrative.” Curiously, people often appreciate simple explanations but balk at stories that aren’t sufficiently complex. Perhaps the discontinuity has to do with the former being considered work and the latter associated often with play or fun. “Tell me a story” is the phrase of a child wanting to be entertained; “explain this” is the demand of a superior in any bureaucratic system. Further, when offering an explanation, complex stories are associated with guilt or falsity, whereas simplicity is connected with truth and as advice for not being caught in keeping one’s lies straight.

These tendencies in human psychology and social communication find rationalization in the use of Ockham’s Razor. Alternatively referred to as the “KISS (Keep It Simple Stupid) principle,” the Razor is the favorite of anybody


Ockham himself was not concerned with simplicity. Consider this from the Stanford Encyclopedia of Philosophy:

Ockham’s Razor, in the senses in which it can be found in Ockham himself, never allows us to deny putative entities; at best it allows us to refrain from positing them in the absence of known compelling reasons for doing so. In part, this is because human beings can never be sure they know what is and what is not “beyond necessity”; the necessities are not always clear to us.

Rather than attempting to address skepticism concerning particular entities, Ockham was more concerned with noting the limitations of human knowledge. The difficulty of “beyond necessity” can be seen by a simple thought experiment. Pick an object in view and consider how it got there, perhaps a tree outside a window. Then broaden the perspective out one step at a time, noting how things are connected. The tree needs a seed, soil, water and sun, then the land itself and whether such was capable of sustaining life of its kind, then how buildings and natural features constrained where it was possible to grow, the cityscape that those buildings are a part of, the societal structure the city is part of and onward into the cosmos. At what point is something considered a necessity? Which entity becomes superfluous to the explanation? Is there even one answer to these questions?

Precisely because of the interconnected reality of nature, necessity and parsimony will quite often be determined less by the context of the situation and more by the structure behind the inquiry. If asked to explain how a rock was thrown, physical mechanics may be brought up, but there’s likely not much purpose in going into the geologic history of the rock itself. If asked “where did we come from?”, the answer will be contingent upon just what is meant by “we” and the nature of what is meant by “coming from.” With this in mind, a person’s principle-driven worldview will determine the extent of a given explanation, what is considered sufficient and when the simple is proclaimed to be needlessly complex.

Thus it is that we come back to a consideration of what Ockham was most concerned with, determining best explanations rather than the denial of things. The extent of the universe that is known continues to be astronomically smaller than that which is unknown. A simple explanation in the past has often been superseded by a more complex answer in the present and there is a high probability that it will be yet further replaced by or expanded into an even more complex answer in the future. If the first inclination when presented with a contrary explanation is to remove it in part or in whole then the concern isn’t in expanding one’s explanatory power, it’s in expressing one’s confirmation bias. If there was a monument to ideas changed and cast aside throughout history, it’s base would be human hubris. The universe is bigger than we think and that’s a good thing.

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