Amazing video: bald eagle acts like a duck

February 26, 2012 • 3:36 pm

Alert reader James sent me this great video.  Talk about exaptations: when the eagle repeatedly fails to catch a nutria in the water, it drops on top of it, and, floating in the water, swims the damn thing to shore using its wings to paddle. (Eagles obviously don’t have feet adapted for swimming, and the feet are occupied anyway.)

Nutrias (Myocaster coypus), by the way, are also called coypus, and are large aquatic rodents originally native to South America but introduced throughout the world for fur farming.  It’s not clear to me if this one was alive before the eagle started dive-bombing it.

That’s one hungry—and determined—bird.

Moar mental health

February 26, 2012 • 9:58 am

I have gone into the lab to find that my Paphiopedilum orchid has bloomed.  I’m pretty sure this is not a hybrid, but a real, naturally-occurring species; sadly, I forgot the species name, but I’m sure Lou Jost or someone else will tell me, and perhaps give a bit of information about the flower:


Once a year I get this flower, which lasts for about ten days.  Lovely, ain’t it?

Sunday Sermon on Sophisticated Theology: Plantinga proves God

February 26, 2012 • 7:14 am

I’ve begun to realize that some of us need to read and answer the arguments of sophisticated theologians, for that wasn’t really done in the four New Atheist volumes.  (And for good reason, too: why should those guys deal with arguments for a proposition plainly lacking empirical support?)

I don’t plan to write a book on this stuff, but I will go after their arguments from time to time on this website. I think it’s a useful exercise for three reasons: it gives us ammunition to answer the frequent accusation that nonbelievers haven’t come to grips with the “best thought” (I cringe to write that) about theology, it shows us how transparently fatuous all of these arguments are, and if we are against religion we must take on not just the “regular” believers but also their academically respectable spokespeople. Knowing these arguments is also useful in debate, for I don’t think many theologians have ever faced serious opposition to their ideas, at least on the debate platform.

On my birthday last year (oy, what a present!) I analyzed some of the arguments of Alvin Plantinga, world-famous theologian and accommodationist,  former president of the American Philosophical Society, emeritus professor at Notre Dame, and author of many books on apologetics.  Surely he represents the best and most sophisticated strain of theological thought, though, as someone who accepts evolution, he’s shown a surprising affection for the intelligent-design arguments of Michael Behe.

Today, my brothers and sisters, I’d like to speak briefly on Plantinga’s evidence for God’s existence, at least as laid out in his chapter “Reason and Belief on God”, pp. 102-161 in The Analytic Theist: An Alvin Plantinga Reader (James F. Sennett, ed., 1998, Eeerdmans Publishing Co.).  That chapter itself (free pdf here) is taken from a book edited by Plantinga and Nicholas Wolterstorff:  Faith and Rationality: Reason and Belief in God (1983, University of Notre Dame Press).  Page numbers are taken from the Sennett-edited reader.

I’ll try to do justice to Plantinga’s arguments, though if you think I’ve distorted them, feel free to post below.

As we know, there’s no good empirical evidence for God’s existence, and to finesse that Plantinga argues against evidentialism: the idea that one’s belief in God must be grounded in evidence if such belief is to be intellectually respectable.  His warrant in this chapter is to show that one doesn’t really need evidence to believe in God:

So presumably some propositions can properly be believed and accepted without evidence [JAC: I give some of his examples below]. Well, why not belief in God? Why is it not entirely acceptable, desirable, right, proper, and rational to accept belief in God without any argument or evidence whatever? (p. 121)

After reviewing the history of theological evidentialism, beginning with Aquinas, Plantinga presents his own argument: that belief in God is a properly basic belief.  A “properly basic belief” is one for which one doesn’t need evidence, for it is manifest to the senses immediately.  Plantinga is fond of using philosophical logic to “clarify” ideas like this, and so this is how he defines his term:

For any proposition A and person S, A is properly basic for S if and only if A is incorrigible for S or self-evident to S. (p. 150)

What he means by A being incorrigible for S is twofold: 1) it’s not possible for S to believe A and that A would be false, and 2) it’s not possible for S to disbelieve in A if A is true.

Here are some examples of beliefs that Plantinga considers “properly basic,” i.e. beliefs for which one doesn’t need evidence. I’ll leave it to readers to judge whether evidence is unnecessary here:

  1. I had breakfast this morning
  2. I see a tree
  3. That person is in pain
  4. And, of course, there is a God

Plantinga sees these beliefs as prima facie evident,that is, as beliefs that “you are under no obligations to reason to [these beliefs] from others you hold. . ” (p. 151).  Nevertheless, he doesn’t see these beliefs as “groundless”:  for such beliefs are held on the basis of other beliefs (i.e., turtles all the way down).  That, of course, is a kind of evidence, but more on that in a minute.

But of course what is “evident’ to one person may not be so for others; for example, you may be deluded about whether you had breakfast, and the tree you see may be a hallucination. This is especially true for belief #4 above.  How does Plantinga get around that? By asserting that the grounds for belief may differ from person to person and from community to community:

Accordingly, criteria for proper basicality must be reached from below rather than above; they should not be presented ex cathedra but argued to and tested by a relevant set of examples. But there is no reason to assume, in advance, that everyone will agree on the examples. The Christian will of course suppose that belief in God is entirely proper and rational; if he does not accept this belief on the basis of other propositions, he will conclude that it is basic for him and properly so. Followers of Bertrand Russell and Madelyn Murray O’Hare may disagree; but how is that relevant? Must my criteria, or those of the Christian community, conform to their examples? Surely not. The Christian community is responsible to its set of examples, not to theirs. (p. 151)

I find this evasive, self-serving, and intellectually indefensible. What he is saying is that what counts as “grounds” (i.e., evidence) for God for some people won’t—and needn’t—count for others.  That, of course, is a big difference between science and theology.  Moreover, he says that it doesn’t matter what counts, so long as someone (or a group of believers) thinks it counts.  But remember that here he’s not just talking about what people believe, he’s talking about what exists, and what warrant we need to believe in that existence. In other words, if a pesky atheist doesn’t like your evidence, that’s too damn bad: God is still there.

Of course this argument can be used to support all kinds of nonsensical beliefs.  Plantinga brings up one: belief in The Great Pumpkin, of Peanuts fame. One could also adduce the Flying Spaghetti Monster, or any of the other deities that have been worshiped through history. Plantinga immediately dispels such nonsensical beliefs in a paragraph immediately following the one above:

So the Reformed epistemologist can properly hold that belief in the Great Pumpkin is not properly basic, even though he holds that belief in God is properly basic and even if he has no full-fledged criterion of proper basicality. Of course he is committed to supposing that there is a relevant difference between belief in God and belief in the Great Pumpkin if he holds that the former but not the latter is properly basic. (p. 151).

And what, exactly, is that relevant difference?

Thus, for example, the Reformed epistemologist may concur with Calvin in holding that god has implanted in us a natural tendency to see his hand in the world around us; the same cannot be said for the Great Pumpkin, there being no Great Pumpkin and no natural tendency to accept beliefs about the Great Pumpkin. (pp. 151-152).

What a tangled thicket of logic we must make our way through here!  First of all, not everyone has a natural tendency to see God’s hand in the world, and even if they do, how does Plantinga know that that tendency was implanted by God, rather than having been taught to credulous children by their parents or preachers?  Is there really a “natural tendency” to accept beliefs in God without having been taught them?  And which God?

And on what basis does he say “there is no Great Pumpkin”?  After all, that is a statement about reality—and Plantinga is using “basic belief” in God as a criterion for what really exists. He is not allowed to say that there is no Great Pumpkin if somebody—anybody—considers the Great Pumpkin a “properly basic belief.”  There is a natural tendency among Muslims to accept a God different in nature from the God of Christians: that is the Islamic “basic belief.”  According to Plantinga, that’s okay, because Muslims have different criteria than Christians (yeah, because they were brought up by Islamic parents!).  But we’re talking about more than just beliefs here, we’re talking about what exists.  And how does one adjudicate among competing existence claims—about Jesus versus Mohamed, for example? According to Plantinga, you can’t: each community has its own “basic beliefs” that can’t be argued against.  It’s madness. It’s no way to find out what’s true.

Now Plantinga really doesn’t think that belief in God is just prima facie evident, or at least that it’s intellectually respectable to think that. He is, after all, an intellectual. He argues further that God belief rests on other beliefs (aka “turtles”):

In this sense basic beliefs are not, or are not necessarily, groundless beliefs.

Now similar things may be said about belief in God.  When the Reformers claim that this belief is properly basic, they do not mean to say, of course, that there are no justifying circumstances for it, or that it is in that sense groundless or gratuitous.  Quite the contrary. Calvin holds [Plantinga is agreeing with him here] that God “reveals and daily discloses himself in the whole workmanship of the universe,” and the divine art “reveals itself in the innumerable and yet distinct and well-ordered variety of the heavenly host.” God has so created us that we have a tendency to see his hand in the world around us.  More precisely, there is in us a disposition to believe that propositions of the sort this flower was created by God or this vast and intricate universe was created by God when we contemplate the flower or behold the starry heavens or think about the vast reaches of the universe. (pp. 153-154)

And so, Plantinga gives us a list of the real basic beliefs that support a belief in God (the lower turtles):

 Of course none of the beliefs I mentioned a moment ago is the belief that God exists. What we have instead are such beliefs as:

  1. God is speaking to me
  2. God has created all this,
  3. God disapproves of what I have done,
  4. God forgives me,   and
  5. God is to be thanked and praised.

These propositions are properly basic in the right circumstance. (p. 154, items renumbered for convenience). .

. . . From this point of view it is not wholly accurate to say that it is belief in God that is properly basic; more exactly, what are properly basic are such proposition as [(1)-(5)], each of which self-evidently entails that God exists. It is not the relatively high-level and general proposition that God exists that is properly basic, but instead propositions detailing some of his attributes and actions.  (p. 154)

Remember, these are incorrigible beliefs: beliefs that it is impossible to hold without them being true!

I find this unbelievable, for all the propositions adduced above presume that God exists, so you know who is speaking to you, you know who has created all this, and you know who is forgiving and loving and yet demands to be thanked and praised. How can you use those “basic beliefs” to support the notion that “God exists” if they all presume that God exists?  How can you intuit, for example, that “God is to be thanked and praised” unless you have a basic belief that there’s a God in the first place?

And of course none of this justifies (nor does Plantinga attempt to justify) the” basic beliefs” in Plantinga’s own brand of Christianity, including his beliefs in the divinity of Jesus and the beneficence of God. Or are those not basic beliefs, but beliefs lifted from scripture?

To paraphrase Orwell, one has to be a theologian to believe things like this: no ordinary man could be such a fool.  This is not a coherent intellectual argument: it is a patently transparent exercise in trying to prove God’s existence in the absence of evidence. It is apologetics: the practice of making stuff up post facto to buttress what you already know must be true. And, at bottom—and despite all the intellectual gymnastics of Dr. Plantinga—it all comes down to revelation, to what a particular group of people happens to find amenable as a “basic belief.”

This cartoon, more than any words I could write, expresses the difference between science and theology (just substitute “the theological method” in the second panel):

(swiped from Richard Carrier’s blog)

A new leaf-nosed bat

February 25, 2012 • 12:39 pm

Courtesy of National Geographic, we have a new bat—Griffin ‘s leaf-nosed bat (Hipposideros griffini)—discovered in Vietnam four years ago but only now described in the Journal of Mammalogy. It resembled an already-known species but was distinguished by small differences in morphology, mitochondrial DNA sequence, and frequencies of the echolocation call.

Photograph courtesy Vu Dinh Thon

Leaf-nosed bats are found in both the New and Old World, and the New World ones are the most numerous group in the order Chiroptera (bats), which itself is one of the most diverse order of mammals, second only to rodents (40% of mammal species are rodents; 20% are bats). A probably aprocryphal story relates evolutionist J. B. S. Haldane’s answer when asked what one could infer about the Creator from surveying his creation.  “An inordinate fondness for beetles,” Haldane supposedly said. (Of the roughly 1.7 million described species on Earth, 300,000-400,000 are in the order Coleoptera—beetles.) If that question were asked about mammals, one could reply that God showed an inordinate fondness for rodents and bats, and a notable distaste for primates.

The function of the “leaf” isn’t fully known, but it’s suspected to be important in receiving the echolocation signals emitted by bats.

Here’s Figure 1 from the paper:

Fig. 1. A) Lateral and B) frontal views of ear and nose leaves of Hipposideros griffini, new species (IEBR-T.200809.12, holotype). Not to scale.

You may find this beast ugly, but that’s speciesism!  I find all animals beautiful because they’re products of evolution, embodying all the mechanisms that drive the process. The ugliness, in this case, is probably a byproduct of natural selection.

Bats are often called “flying rodents,” but they’re not even close to rodents.  They are in completely different orders of mammals: Rodentia vs. Chiroptera. Here’s a phylogeny of mammalian groups based on Tree of Life data from the University of Arizona and Berkeley, which clearly shows that humans are more closely related to rodents than rodents are to bats (see also my more comprehensive post on mammalian phylogenies from last October). It’s the weekend, so you can use that bit of information as cocktail-party chat, guaranteed to stop all conversation.

Thong, V. D. et al. 2012. A new species of Hipposideros (Chiroptera: Hipposideridae) from Vietnam. J. Mammalogy 93:1-11.  http://dx.doi.org/10.1644/11-MAMM-A-073.1

More ludicrous misrepresentations of Dawkins

February 25, 2012 • 6:18 am

The journalistic backlash continues in both the UK and US against Richard Dawkins and his Foundation’s “Christianity poll.” After accusing Dawkins of profiting from slavery, the newspapers have yet another card up their sleeve.

This week Dawkins debated the Archbishop of Canterbury at Oxford. During that debate, Dawkins reiterated what he stated clearly in The God Delusion: he couldn’t be 100% sure that God doesn’t exist, but as a scientist felt that the odds are very much against it.

He then proposed a 7 point spectrum of theistic probability in which 1 represented complete assurance (“I know God exists”) and 7 represented complete atheistic certainty (“I know there is no God”). As I recall, Dawkins put himself at 6.5 on that scale (Wikipedia reports a 6, but I’m not sure as I don’t have the book at hand), for no scientist can know with absolute conviction that anything doesn’t exist. (I’d put myself at 6.995 on that scale.)

In the debate, Dawkins reiterated that ranking explicitly, placing himself at a 6.9. This was reported by several newspapers, including the two below.  But what headlines did they choose to use when reporting the debate?  Wait for it:

From the Washington Post:

And the Daily Telegraph:

More dreadful journalism: hyped headlines, the revelation of something that’s been known for years, and a misunderstanding of how science operates.

I wonder what how the Archbishop would rank himself on that scale. Would he put himself at 1?

UPDATE: I missed the HuffPo article, which, though identical to the Washington Post article, has a slightly different headline:

h/t: Diane G., Andrew Hackett

James Wood on Santorum’s Earth-wrecking theology

February 25, 2012 • 3:21 am

I’ve occasionally taken issue on this site with James Wood’s seeming friendliness to religion despite his own nonbelief, but have also praised him for his terrific literary criticism at The New Yorker (he’s their chief literary critic and a professor at Harvard).

Wood gets more kudos this week for a nice short piece at The New Yorker (free!), Senator Santorum’s Planet.  At issue is Santorum’s own phony theology (an accusation he leveled at Obama)—in Santorum’s case that humans can bloody well do with the Earth what they want.  As Wood notes:

“This idea that man is here to serve the earth as opposed to husband its resources and be good stewards of the earth” is, he maintained on CBS’s “Face the Nation,” “a phony ideal. I don’t believe that’s what we’re here to do. That man is here to use the resources and use them wisely, to care for the earth, to be a steward of the earth. But we’re not here to serve the earth. The earth is not the objective. Man is the objective, and I think a lot of radical environmentalists have it upside-down.” That kind of ideology, he complained, “elevates the earth above man.”

. . . Hence a particular impatience with the values of environmental conservation. For the apocalyptic Christian, sights set firmly on heavenly life, the earth might indeed be a finite and transitory thing, what William Blake wonderfully called a “mundane egg.” Man is what needs to be protected, because each of us is a soul, whose eternal fate is up for grabs.

So when Santorum says that we must be good stewards of the earth, there is religious zealotry behind the sweet words. He is proposing, in effect, that the earth is dispensable but that our souls are not; that we will all outlive the earth, whether in heaven or hell. The point is not that he is elevating man above the earth; it is that he is separating man and earth. If President Obama really does elevate earth over man (accepting Santorum’s absurd premise for a moment), then at least he believes in keeping man and earth together. Santorum’s brand of elevation involves severing man from man’s earthly existence, which is why it is coherent only within a theological eschatology (a theology of the last days). And he may well believe that man cannot actually destroy the earth through such violence as global warming, for the perfectly orthodox theological reason that the earth will come to an end (or be renewed) only when Christ comes again to judge the living and the dead. In other words, global warming can’t exist because it is not in God’s providential plan: the Lord will decide when the earth expires. This is Santorum’s “theology,” phony or otherwise.

It’s this brand of invidious religion, of course, that makes many Republicans so indifferent to what we do to the environment. Lay on the pipelines, the strip-mining, the offshore drilling—it’s all in God’s hands, anyway!

This is just another reason why religion poisons everything—the very Earth, in this case—and why it cannot be a matter of indifference, as someone argued this week, what people believe so long as they don’t try to force creationism into our schools.  Even while we’re beating them back on the creationism front, they’re wrecking the planet on others, all in the name of God.