Showing posts with label necessity. Show all posts
Showing posts with label necessity. Show all posts

Thursday, January 14, 2016

Richard Carrier on the argument from contingency



I’ll be blunt. I’m not a big fan of Richard Carrier. Read almost any reply from Carrier responding to a critic of his work, and you’ll notice how arrogant, condescending, and antagonistic he is with his interlocutors. It can be very difficult at times, for me, to read through a polemic work of his without being extremely put-off. (Just survey his articles wherein he claims that the late Maurice Casey, Joseph Hoffman, Stephanie Fisher, and Robert Eisenman are all literally insane.) However, while I dislike him, I do find that many of his theses are well-thought out, well-argued, and worth responding to—I think this specifically about his book Sense and Goodness without God  and what I’ve seen from his arguments for Jesus-mythicism (though I haven’t yet read his On the Historicity of Jesus yet).

Now, the other day I was writing an upcoming post regarding atheist responses (and mischaracterizations) of the cosmological argument, and I realized that I had never read what Carrier’s specific replies were regarding said argument. (I have surveyed Carrier’s thoughts on God as an ultimate explanation here, but I had never seen him directly address the cosmological argument.) I decided to look up some of his responses, and one response I came across consisted of a handful of Carrier’s supposed refutations of the argument from contingency (the argument I find most persuasive, and have defended here) promulgated in a rebuttal, which was part of a debate he engaged in with Tom Wanchick in 2006 (see here). I (obviously) found Carrier’s rebuttal to be inadequate—though to be fair his opponent Wanchick formulated the argument poorly—and I will argue presently that he failed to refute the argument from contingency, when the concepts are formulated properly.  

So, let’s dig in by surveying Carrier’s first objection:

First, Wanchick has not shown that the universe does not exist necessarily. Contrary to what Wanchick falsely claims, scientists now agree that we cannot know whether the whole of existence had a beginning, even if the observable part of it did, nor do scientists agree that everything that exists (including all space-time) will end, even if the present cosmos will.

While Wanchick might have attempted to ground his argument in a universe which had a beginning, the argument from contingency need not assume such a thing. For the claim “the universe does not exist necessarily” does not require a universe that must have had a beginning. That is to say, the eternality or non-eternality of the universe is completely peripheral. For the theist argues that even an eternal universe can still be contingent.

But how can we actually establish whether the universe, or any other existing thing, is contingent or necessary? Well if it is not of the nature of X to exist, then X must derive its existence from something outside itself, and therefore it is contingent. That is, if the nature or essence of X does not provide the reason for its existence, then X is contingent. Another way to think about this is that if I can contemplate the nature of X without simultaneously contemplating its existence, then the reason for the existence of X is not contained within its nature, and it is, again, contingent. (There are many other criteria that can be applied: if something is ontologically composed of parts, or if it is a composite of act/potency etc.) Therefore, we need only apply these criteria to the universe to determine whether is satisfies said criteria. And indeed, what does happen when one applies this standard? Well, the nature of the universe is that it is all space-time, matter, and energy. But obviously, contemplating all space-time, matter and energy does not clue us in regarding why space-time, matter, and energy exist in the first place. That is to say, contemplating the nature of the universe does not provide us with the reason for why it exists at all—and it certainly doesn’t tell us why this universe exists and not another, or why any universe exists instead of none at all. Therefore, the universe’s nature does not contain the reason for its own existence, and thus it is, by definition, contingent.

So while Carrier might have been correct that his interlocutor did not demonstrate why the universe is contingent, we surely have. And none of our arguments need rest on the premise that the universe had a beginning, or will come to an end.

Carrier moves to his second objection:

Second, Wanchick has not shown that "every substance [including the universe] has an explanation." Wanchick only offers as evidence our observations regarding the effects of a universe. But he hasn't demonstrated that these observations hold for a universe itself. The only way we can logically infer that what is true of "the effects of a universe" is probably true of the universe itself is if we assume the universe is an effect, since otherwise we only have knowledge of effects, and whether the universe is an effect is precisely the matter in dispute. Wanchick hasn't demonstrated that the universe is an effect, and if the universe is not an effect, what we conclude about effects within a universe will not necessarily apply to the universe.

Carrier’s point here is spot on. However, it’s only adequate based on the fact that his interlocutor is (again) doing a poor job promulgating the argument from contingency. We can do better. For the way to demonstrate that the universe necessitates an explanation is to demonstrate 1) that the universe does not contain the reason for its own existence (which we have done); and 2) that the existence of brute facts is impossible. For if one cannot logically rule out brute facts, then it is always possible that the universe just exists with no rhyme or reason, end of story. Luckily I’ve already argued that brute facts are logically impossible (here), and therefore we’ve demonstrated that the universe requires an explanation for its existence, contrary to Carrier.

Carrier articulates his third objection:

Third, Wanchick claims "only minds" can cause any time or location to exist, but this cannot be true. It is logically impossible for a mind to think or act without a time in which to think or act, and a mind that has no location exists nowhere and what exists nowhere does not exist.[2] Therefore, he has offered no logical explanation for space-time. Likewise, Wanchick claims "there was no nature prior to the universe" as a reason to reject natural causes of the universe. But if "the universe" includes time, then there can never be a time when the universe didn't exist--even if the universe began--and therefore it is logically impossible for anything to exist at any time "before" the universe, whether a person or a thing. So if there was no nature prior to the universe, there was no person, either.

Here Carrier is implicitly begging the question. (Let us ignore the Scholastic doctrine of analogy presently since Carrier was not debating a Thomist.) It is not clear that one cannot act without time or space unless you a priori assume metaphysical naturalism. That is, to act must be to be actual, or to exist, in some way—you cannot act and not be actual—and thus Carrier is essentially saying that there cannot be existents without space-time—meaning there can be no existence outside of the natural world—which begs the question in favor of naturalism. He does the same thing with regards to time. I agree that it is nonsensical to say that anything existed “before” there was time, but this only means that temporal existence is nonsensical “before” the universe. However, we cannot assume that existing things can only be temporal unless we assume naturalism beforehand—that is, unless we assume that existents can only exist inside space-time and the natural world. Carrier is simply begging all the questions he possibly can.

Carrier moves to his last objection:

Finally, it's not logically impossible that "it is in the nature of a universe to exist," and if it's in the nature of this universe to exist, then the existence of this universe is self-explanatory. Even if we accept that "the explanation of the universe must be a metaphysically necessary, uncaused being," which "metaphysically necessary, uncaused being" would that be? Wanchick hasn't demonstrated that this "being" can't be the universe (or some part of it), nor that it could be a god.

A few responses. First, while it might not be logically impossible that it be of the nature of the universe to exist—though I would challenge this as well [1]—this tells us nothing about whether the actual universe is indeed necessary. And reasoning this way, though I’m not claiming Carrier is, is exactly the fallacy that the ontological argument commits. Second, if we accept a necessary being as an explanation of the universe I don’t understand why Carrier thinks the question “What necessary being would that be?” is efficacious. For if we arrive at a necessary being we arrive at the ultimate explanation of everything. That is, we arrive at the terminus of explanation itself in that which explains itself as well as everything else. And unless Carrier thinks there can be more than one of these necessary existents then I fail to see how his question makes any sense, or has any force against his interlocutor’s argument. Moreover, while Wanchick might not have successfully demonstrated that this necessary being cannot be the universe (or part of it), we certainly have.

So we have surveyed Carrier’s arguments against (a specific formulation of) the contingency argument. While some of Carrier’s objections pose a problem for his interlocutor’s formulation of the argument, I think this is due to the lack of said interlocutor’s ability to promulgate a more persuasive version of said argument. For we have seen that Carrier’s objections really pose no problem whatsoever when compared against a more rigorous formulation.
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[1] While we might be able to imagine a universe which is necessary I don’t see that we can conceive of one. For by universe I, again, mean that which is all matter-energy, and space-time. But to reiterate, contemplating all matter, energy, and space-time cannot tell you why this matter, energy, and space-time exists in the first place—for if it could then matter, energy and space-time would be self-explanatory already, and this current universe would be necessary, which we saw above it isn’t.



Sunday, January 4, 2015

The argument from contingency


The cosmological argument for the existence of God has taken many different forms for hundreds of years. However, the version that I take to be the most powerful, as some readers of my blog know, is the argument from contingency. And it is this version that I will be presently defending, as well as answering common objections put forward against it.

The terms
Before promulgating the argument I feel it necessary to define the terms being used (i.e. contingency and necessity). Now, there are different (though not contradictory) definitions of contingency, so let me spell these out. Something is contingent if: (1) it exists, but could have possibly failed to exist, or (2) it is not of the nature of it to exist, or (3) its nature can be contemplated without simultaneously contemplating its existence.

Let me now expand these definitions so as to illuminate how they each entail contingency. If some existent X satisfies (1) then, to reiterate, it is possible that X could not have been. But this necessarily entails that it is not of the nature of X to exist. For if it was of the nature of X to exist, then it could not be possible for it to fail to exist. (My claim here is that if it is of the nature of X to be Y, then you cannot have X without Y. As an example, if it is of the nature of a triangle to have three sides then it is not possible for an triangle to fail to have three sides.) This point seems to lead us directly to (2), and thus our first two definitions go hand in hand. Now what this means is that if it is not of X’s nature to exist, then X does not contain the reason for its own existence, and thus it must derive its existence from something else.

 Let’s take a look at (3). If I can contemplate the nature of X without simultaneously contemplating its existence, then this entails the fact that it is not of the nature of X to exist—otherwise contemplating the nature of X would be to simultaneously contemplate its existence. Thus we see that (3) leads to contingency for the same reasons as (1) and (2).

From what precedes it should be obvious how we can define necessary. Something is necessary if it is non-contingent. That is to say, something is necessary if it is not possible for it to not exist (i.e. it must exist), or if it is of its very nature to exist, or if contemplating its nature entails simultaneously contemplating its existence.

The argument
It is now appropriate to state the argument from contingency, and note that the term contingency in the argument can take the form of any of the above definitions:

1) If something is contingent, then it derives its existence from something outside of itself.
2) The universe is contingent.

3) Therefore, the universe derives its existence from something outside of itself.
The argument is logically valid, that is, the conclusion follows necessarily from the premises. But the question can be posed regarding its soundness, so let us go about demonstrating the premises. Premise 1) seems to follow necessarily from the definitions of contingency given above. To reiterate, if it’s possible that X could (have) fail(ed) to exist, then the reason for its existence is not contained within its own nature, and thus it must be contained in the existence of something else—and this thing would be where X derives its existence from. Premise 1) then seems to be on quite solid ground.

Let us now turn to what is most likely the premise that a naturalist will find most fault with, namely, premise 2). The easiest way to demonstrate premise 2) is to demonstrate that the universe satisfies the definition(s) of contingency. So, the first thing we can ask is whether it is possible for the universe to have failed to exist. Here we might meet some resistance. First, what exactly is meant by the universe, and how do we know that we can conceive of it failing to exist? Well, by universe I simply mean “all matter, energy, and space-time,” and therefore this includes not only our observable universe, but any meta-universe(s), if you will. Subsequently, to say that we can conceive of matter, energy, and space-time not existing does not seem to bring forth any inherent difficulty. That is to say, there is no contradiction or incoherence in such a statement, and thus I see no claim for inconceivability that could be made here. (Note that something is said to be metaphysically possible if it is conceivable.)
What about the second definition of contingency? Does the nature of the universe contain the reason for its own existence? I don’t see how it does, in that having the nature of being all matter, energy, and space-time does not tell us why all matter, energy and space-time actually exist in the first place. That is, there is nothing in matter, energy and space-time together (or even apart) that tell us that it must exist. This goes hand in hand with the third definition of contingency. That is, I can contemplate the nature of the universe without simultaneously contemplating its existence. But if I can do this, then the reason for the existence of the universe is not found within itself.

What this demonstrates then is that the universe—all matter, energy, space and time—satisfies all three definitions of contingency, and thus the premises of the above argument seem to be vindicated. This obviously means that the conclusion is valid and sound, and therefore the universe necessarily derives its existence from something else.

Objections
It should go without saying that the naturalist will not take this argument lying down, nor would I expect one to do so. There are many arguments or objections that could be leveled against the argument from contingency, and while I cannot deal with all of them here, I will currently try to deal with the most penetrating and popular ones.

(a) How do we know that what the universe derives its existence from is God? There is nothing logically wrong with claiming that perhaps the universe derives its existence from something that is itself contingent. However, this only pushes the problem back a step further, for then this thing requires an account for its existence. The point here is that we must, at some point, admit of something which is non-contingent, that is, necessary—something that cannot fail to exist. This would be something whose nature contains the reason for its own existence, and whose nature we can contemplate while simultaneously contemplating its existence. This thing then just would be existence, that is, it would be pure existence, or pure being. And surely this is worthy of earning the name “God.”
(b) Why admit of something necessary? Why can’t we have an infinite series of contingent beings? I will not answer this objection by asserting that an actual infinity cannot exist. For this is something that it seems even mathematicians and philosophers cannot agree on. Rather, my argument is that a chain of contingent beings remains contingent. Now, before one levels a fallacy of composition at me, remember that not every inference from a part to a whole is fallacious. For instance, if every brick in a wall is red, then it does in fact follow that the wall is red. What this means is that claiming that a chain of contingent things is itself contingent commits the fallacy of composition would need to be demonstrated. Moreover, this could be avoided if one simply demonstrates that a collection of contingent things is in fact contingent, and this I plan to do currently.

Physicist Paul Davies explains the problem elegantly:

[I]t is quite wrong to suppose that an infinite chain of explanation is satisfactory on the basis that every member of that chain is explained by the next member. One is still left with the mystery of why that particular chain is the one that exists, or why any chain exists at all.


This point was also made a long time ago by the mathematician Leibniz when he gave an example of an infinite collection of books, of which each book was simply a copy of the content in the previous book. The point being that the content in the books is not accounted for simply because the collection is infinite, and there must be something outside this collection that does account for it. The big picture here, then, is that if we have an infinite collection of individual things of which it is possible for them to fail to exist, then it is possible that the collection in its own right could fail to exist, and thus the infinite chain is still contingent. Therefore something necessary must still be admitted.

(c) Why expect the universe to admit of explanation at all? Why can’t the universe simply be? To claim that the universe (or anything) might escape explanation in principle is to admit of brute facts—in fact, that’s exactly what a brute fact is, namely, a state of affairs which has no explanation for its existence. There are a few problems with this line of reasoning. First, since things are made intelligible by explanation then a brute fact does not have an explanation for itself, and it has no explanation to impart to anything else. This entails that a brute fact cannot be a participant in an explanatory chain, and therefore it certainly cannot be the end of an explanatory chain, as the universe would have to be. (Note that I have argued this at much greater length here.)
The second problem is that an object or substance can only either possibly fail to exist, or not. This is to say that something can only either be contingent or necessary. There is no middle ground here, of which a brute fact would have to be. To deny that something can either only be contingent or necessary is to deny the law of excluded middle, and would thus be illogical.

(d) It’s possible that the universe is eternal, and thus it would not be contingent. I have no problem with theoretically granting the possibility of an eternal universe. However, simply asserting that the universe could be eternal does not thereby make it necessary. Let us return to Leibniz’s example of the collection of books to see why this is so, except let us not imagine a collection of books but, rather, simply one book existing eternally. Does the fact that this book has always existed demonstrate that it is necessary? No, because one can still ask why this book exists, has the content that it does, and why this content was not different. The point is that it remains true that nothing about the book, not even its eternality, provides the reason for why it exists at all.  To always exist is not the same as existing necessarily, because duration of existence does not enlighten us to the reason of existence. Moreover, duration of existence does not affect a thing’s nature. A triangle is still a triangle, whether it exists for a second or for an infinite amount of seconds.
Similarly, it would remain the case that an eternal universe could possibly have been different, or it could have not existed at all. Moreover, it would still remain the case that contemplating the nature of the universe does not entail contemplating its existence. Thus, even an eternal universe satisfies the definition, not of necessity, but of contingency.

There are other objections that can be raised (e.g. “What created God?” or “Why does God exist?”) but I felt the need to only address, what I take to be, the most substantial ones. The point seems to remain that the universe is indeed contingent, and that it ultimately derives its existence from something which is necessary and which we call God. The argument from contingency then seems to be successful.