Tuesday, September 15, 2009

Why God can't exist

In the world of philosophy, those who make the active claim that God does not exist are often viewed as extremists. Taking a positive stand about the nonexistence of God is considered akin to claiming that all forms of matter, energy and consciousness have already been discovered, and that there is nothing new to be learned from the universe. The simple fact that scientific truths are constantly being overturned is considered reasonable justification for a form of scientific agnosticism, which is generally expanded to include the vague possibility of the existence of a supernatural being such as gods. Since we do not know everything about the universe, agnostics claim, it is impossible to rule out the possibility that gods might exist. Thus “strong atheism” – the positive declaration of the nonexistence of gods – is generally viewed as an irrational position, ironically on par with the theist’s assertion that gods do exist.

Thus, like most positions in the post-Hegelian world, the truth is considered to lie somewhere in the midpoint between two extremes. Wildly asserting that gods exists is as irrational as blindly asserting that they do not. The most sensible position is to withhold judgment.

Those with any decent knowledge of philosophy know that the burden of proof lies squarely on the shoulders of those who assert that gods exist, and that no action is required from atheists to disprove the existence of gods. However, the inevitable failures of all attempts to prove the existence of gods never seems to move the theist position into the “not true” category – merely into the “not proven but possible” category. In this essay, I will endeavor to give it just a little push over the line.

Like most problems in philosophy, the conflict stems from imprecisions in definition. “God” is a notoriously fluid concept, able to slosh fashionably into almost any mental container. God can be defined as a “higher power,” or “love,” or “energy,” or “nature,” or “an old man on a cloud,” or “the energy that binds the universe together” or “the first cause” or “hope” etc. etc. etc. Naturally, no philosophical discussions can retain any coherence in the face of such wildly amorphous – and often contradictory – definitions.

Similarly, the definition of “existence” is often confused. Does “existence” mean “any form of matter, energy or consciousness that could conceivably exist in this or any other universe,” or does it mean “a Christian deity whose son came back from the dead”? Does it mean “that which is composed of matter or energy,” or “that which I believe with all my heart to exist”?

Of course, if “gods” and “existence” is defined in a tautological manner, no advance in knowledge is achieved. If “gods” are defined as spiritual beings discoverable through faith, and “existence” is defined to include that which is discoverable through faith, nothing is gained. “Existence” must be an objective state, and “knowledge” must be an objective methodology.

Now, for science, “existence” is a relatively simple concept – it is defined as that which consists of either matter or energy. This is quite different from “accuracy,” which is the correlation between concepts and the behavior of matter and energy in the real world. A concept has accuracy – or validity – if it precisely predicts or describes the behavior of matter and energy in the real world. This, of course, is the basis of the scientific method, which is that all human concepts must bow to the empiricism of physical evidence. Or, to put it another way, in any conflict between consciousness and matter, consciousness must give way, since consciousness can contain errors, but matter cannot.

With this (admittedly brief) introduction in place, we are a good deal closer to understanding the conflict between strong and weak atheists. The central question about the existence of gods – no matter how defined – is this: are gods subject to physical laws?

If gods are subject to physical laws, then the first law that gods are subject to is this: since existence is defined as that which is composed of either matter or energy, if gods exist, they must be composed of either matter or energy.

The opposite corollary must also be true. If gods are not composed of matter or energy, then gods by definition do not exist. Since “existence” is defined as that which is composed of matter or energy, “non-existence” must be that which possesses neither matter nor energy. Thus to argue that gods exist despite a total absence of matter or energy is to argue that existence equals non-existence, which is a complete contradiction. If I define an “orange” as a round citrus fruit that is orange in color, I cannot include in that definition an invisible orange that is the opposite of round, the opposite of citrus, the opposite of fruit, and the opposite of orange. (I mean, I suppose could, but who would believe that I was serious – or even sane?)

If gods are subject to physical laws, then physical evidence is really the only methodology by which we can ascertain that gods exist. Of course, this does not require direct physical evidence – we cannot perceive black holes directly, but we know that they exist due to the effects of their gravity wells on surrounding matter, as well as the flashes of energy that are released as captured matter crosses the event horizon. But since “existence” is defined as that which is composed of matter or energy, the scientific proof of existence must be some evidence of that matter or energy. “Evidence” is basically defined as that which impacts our physical senses in some manner – either directly, or through some translating device such as a spectrograph or an oscilloscope. Since our physical senses are organs designed to transmit the effects of matter and energy, it is essentially through the evidence of the senses that we can determine the existence or nonexistence of things. If I argue that something exists, but that there is no way to detect it, my argument contradicts itself. Let’s say I tell a deaf man that I hear a deep loud sound coming from a speaker. If he lays his hand on it and feels no vibrations, he has every right to be skeptical. If I say that this loud sound does not have vibrations, he may then pull out his trusty microphone or other sound wave detector. If this instrument detects no sound in the vicinity, can I still tell him that this loud sound is occurring? At some point, if my definition of “loud sound” basically boils down to “that which is the opposite of any evidence that a loud sound is occurring” then clearly my approach to truth needs a little work!

This approach helps clarify the truth-value of the proposition that gods do not exist. If gods are subject to physical laws, then sensual evidence of some sort is required to determine the existence of gods. If gods are not subject to physical laws, then gods do not exist by definition, since that which is not subject to physical laws – i.e. is not composed of matter or energy – does not exist.

If gods are subject to physical laws, important ramifications follow. Since gods must be bound by physical laws, miracles are impossible, since miracles are by definition violations of physical laws. Similarly, gods cannot be omniscient and all-powerful, since both attributes would violate the basic tenets of physical laws. Omniscience would require instantaneous knowledge of all matter, past, present and future, which is clearly impossible, while omnipotence would require the ability to break the bounds of physical laws, which brings us back to the realm of nonexistence.

If gods are subject to physical laws, then religion makes no sense whatsoever, and praying to gods makes about as much sense as worshiping a black hole, begging the Sun to grant you favors, or circumcising your son to appease the speed of light. If gods are not subject to physical laws, then the concept of “gods” is synonymous with the concept of non-existence, which makes religion even more deranged. Then, rather than praying to the moon, you would be in fact praying to the empty space between the Earth and the moon.

Why is there such opposition to the proposition that gods do not exist? Many people I have talked to with regards to strong atheism feel extremely uncomfortable asserting that gods do not exist. Or, to be more precise, they feel extremely uncomfortable telling Christians, say, that the Christian god does not exist. Rather than confront faithful believers with the hollow falsehood of their imaginary worship, they redefine “God” within their own minds as “a potential form of matter or energy that has not been discovered yet,” or “that which could exist in an alternate universe,” or something to that effect. This allows them to continue breaking bread – or least avoiding open conflict – with those addicted to superstitious nonsense. However, it could be argued that this is a fairly cowardly position. Either a criterion for determining truth exists, or it does not. If such a criterion exists, then it must be objective, and based on the evidence of the senses and reason, which precludes the existence of any form of religious deities. If no such criterion exists, then both everything and nothing is true, and agnosticism, atheism, superstition, religion and the steadfast belief that shoes can fly and sing songs are all equally valid.

If an objective criterion for truth exists, then it cannot logically be applied according to whim, the expediency of the moment, or only in situations that feel emotionally comfortable. If you wish to take a stand for rationality and truth, then I for one completely applaud you – and sympathize with the attendant social difficulties that often result. If, however, you take a stand for rationality and truth, but then sit back down whenever anybody gets upset, there’s very little point getting up to begin with.

By Stefan Molyneux

2 comments:

  1. "In the world of philosophy, those who make the active claim that God does not exist are often viewed as extremists."

    First of all, you make a statement here without providing any evidence. In fact, I suspect that your claim here is false as the vast majority of professional philosophers are atheists. See the study by David Bourget and David Chalmers, which is the largest survey of professional philosophers ever undertaken. Of 931 respondents from 99 leading philosophy departments, the results are: 72.8% atheists, 14.6% theists, and 12.5% other.

    I'd like to address a fundamental assumption which seems to provide the foundation for your thoughts: "Scientism," which is the belief that "all truth is scientific truth." Scientism is necessarily false, for the claim "all truth is scientific truth" is itself not a scientific claim. There is no testable, empirical procedure that will demonstrate that "all truth is scientific truth." It is rather a philosophical claim, being a position on epistemology.

    Secondly, there are many truths, such as the objective truths of mathematics, history, and ethics, which are clearly non-scientific. Subjective truths (such as those of art, music, food, poetry, and theology) also exist and are meaningful for most people.

    (By the way, atheists that are not themselves scientists seem to exaggerate the power and scope of science far beyond what experienced scientists actually claim for themselves. Scientists know that science cannot yield absolute truth: science by definition is incomplete, imperfect, and permanently open to revision in light of new evidence.)

    Thirdly, the demand for scientific evidence for all beliefs is absurd and actually undercuts the foundation for science. Consider two beliefs you and I hold that we have no valid argument for: (1) "Our sensory apparatuses are reliable." and (2) "The future will be like the past."

    There is no way to prove (1). In order to prove that our sense perception is accurate, we would have to compare (A) the reports of our sensory apparatus and (B) the way the world actually is, and then show that they are the same. But there is no way of getting at (B), the way the world "really" is, except through our senses! We would have to assume that our senses are reliable to get (B), which is the very thing we are trying to prove.

    Next, let's try to prove that "The future will be like the past." (I'm not talking about "historical events" -- I mean in terms of physical laws, those will not suddenly change on us, like in "Alice in Wonderland." The physical laws that have been true throughout all human experience will continue to be operational in the future.) How do we prove that? By induction. At any time in the past, this rule was true. For example, if we divide the world into past and future at the year 2000, the "future" (2000 to present) was like the past (time up to 2000). Since this rule was true at every time in the past, we can say it will be true in the future. Wait! That step ASSUMES the very thing we are trying to prove, that the future will be like the past!

    As we can see, there is no non-circular way to "prove" that our sense perceptions are reliable, or that the future will be like the past. I believe these things without proof. However, these two truths serve as the foundation of all scientific investigation (that our senses give us real information about the world, and that the physical laws are unchanging). If you demand proof for all of your beliefs, you will throw out the foundation of science.

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  2. (continued)

    My whole point here is that science has limitations, and you can't use science as the source of all truth. You do this in your "scientific" definition of existence as that which is made up of matter or energy. Yet many things "exist" without being made up of matter or energy. For example, truth, love, beauty, hope, and logic all "exist" without being actual objects. A baseball game "exists" without being an object -- it is the relationship between other objects. My lap also "exists" when I am sitting down, but does not exist when I am standing up.

    You are right to recognize that "existence" means multiple things in various contexts, but you are wrong to insist that "scientific" existence is the proper one for discussing the existence of God.

    You criticize Christian arguments that slickly "define" God as existing, saying, "Of course, if 'gods' and 'existence' is defined in a tautological manner, no advance in knowledge is achieved."

    However, you do the exact same thing when you tautologically "define" gods out of existence when you define the supernatural as non-existent. You say, "If gods are not composed of matter or energy, then gods by definition do not exist." You also say, "If gods are not subject to physical laws, then the concept of 'gods' is synonymous with the concept of non-existence, which makes religion even more deranged."

    You can't "define" the supernatural as non-existent. You must make a persuasive case for the non-existence of the supernatural, which you never do.

    (My own view, however, is that God is neither "natural" nor "supernatural," but that God is above all talk of God.)

    Many paragraphs throughout the second half assume the presupposition that "gods are subject to physical laws. " This is a straw man, for classical theism describes God as the author of all physical laws, and he is not subject to them and can suspend them at will (miracles, etc.)

    You make no arguments against the existence of god(s) that are above the laws of nature except a definitional one, which does not advance our knowledge. You make no arguments for basic naturalism.

    Lastly, you said, "If I argue that something exists, but that there is no way to detect it, my argument contradicts itself."

    That is in no way a contradiction.

    Here is a counterexample. It is quite reasonable to believe that there are large parts of our universe, containing many galaxies, etc., that are undetectable from Earth because they are too far away for their light to have reached us by now. Furthermore, the universe is expanding. If a galaxy is sufficiently far away, the space between us and that galaxy is expanding at a speed faster than the speed of light, which means its light will NEVER reach us.

    Why is it reasonable to believe that these galaxies exist? Well, based on what we know about the expansion of the universe since the Big Bang, the universe has expanded to be far bigger than what can reach us by light in the finite time since the universe began. The light (and gravitational effect, for the gravitational influence propagates at the speed of light) from one of these galaxies will never be experienced by us. I have just argued that something exists, but that there is no way to detect it, which is the very thing that you said involves a logical contradiction.

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