Ken Ham is mad at Bill Nye again, because in the wake of the Rubio nonsense, Nye went on the air to explain why the earth is actually 4½ billion years old. Here’s the clip:

Now here’s where Ken Ham wigs out.

Well, children’s TV host Bill Nye’s understanding of science is worse than I thought. A few days ago, Bill Nye was interviewed on CNN about the age of the earth (this topic was a hot one in America because of headline news after Sen. Marco Rubio was asked a question about what he believed concerning the age of the earth).

Bill Nye in this CNN interview actually equated the age of the earth to the invention of smoke detectors. Hard to believe—but he did!

No, Ham really didn’t understand anything Bill Nye said, and it’s richly ironic to see Ham claiming someone else has a worse understanding of science.

Ionizing smoke detectors use a tiny amount of radiactive material to generate charged ions by their decay; these ions are released into the space in a capacitor, and their movement generates a constant trickle of current. If smoke particles enter the detector, they bind to the ions and block the current; that easily measured decline in current is what triggers the alarm in the detector.

This is a very simple system that depends entirely on our quantitative understanding of radioactivity. If radioactivity didn’t work like we thought it did, your smoke detector would not be very reliable, and for that matter, no one would have thought of using this function to work as a smoke detector.

Bill Nye did not equate the age of the earth to smoke detectors. He used smoke detectors as an example of how scientists have a very thorough understanding of radioactive decay. What he did use as an indicator of the age of the earth was a very brief summary of how rubidium decays into strontium with a half-life of about 48 billion years, allowing us to estimate the age of a sample by measuring the relative amounts of the two elements.

Ham then goes on his usual ignorant tangent of observational vs. historical science (ignore it, it’s rank inanity and I’ve dealt with it before) and challenges Nye to explain the very fact he explained in the video: I’ve highlighted a particularly relevant bit.

I once again challenge Bill Nye to give us one example of how evolution has anything to do with the development of technology and to explain how smoke detectors have anything to do with the age of the earth—when a detector is actually the result of intelligent observational science and the accumulated information about the properties of matter that enabled inventors to build such technology.

Yes, exactly. We have accumulated information about the properties of matter that allow us to build smoke detectors, and that same information rules out the possibility that the earth is 6000 years old. The information contradicts Ham’s claims. But what Ken Ham wants to be able to do is throw out the scientific information that makes his biblical exegesis into nonsense, and keep the bits that allow smoke detectors to work.

You don’t get to do that.

But the smoke detector discussion wasn’t about evolution, anyway. It was about a measurable physical property of the universe, its age, which Ham denies. I wish these guys could get it straight: evolution is about biology, and describes processes in living creatures that occurred on this one planet; physics is describing more general physical properties that are not specific to biology.

Ham is screeching about a debate between Nye and one of his clueless staff people. I do not recommend that Bill Nye take him up on it — as we can see, the Answers in Genesis folk don’t understand anything, don’t pay attention to what other people say, and don’t learn anything, so a debate would just be an opportunity for a creationist to preach from a podium with a credible and credentialed real science educator right next to them. Not a good idea.

I really shouldn’t be surprised; Pat Robertson is kind of a dinosaur himself, and this literalist creationism pushed by Answers in Genesis is actually a relatively new development, but Robertson did come out and plainly reject the notion that the earth is only 6000 years old, or that dinosaurs and humans lived together. That’s sort of good news, but it’s really just old school creationism of the type that was common at the time of the Scopes trial and up through the 1950s.

But still…it’s always helpful to see the religious right splitting this way. You just know that Ken Ham is spitting blood in fury at this horrible liberal Christian who is denigrating the holy word of god! For the Hamites, the young earth is a bloody battle flag emblematic of their whole struggle for a Christianist nation, and to see Robertson under the banner of “Millions of Years” must be irritating.

(via The Friendly Atheist.)

Answers in Genesis, that awful creationist organization, has a couple of tactics that they use to argue that they’re doing Real Science and the real scientists aren’t.

1. They set up a dichotomy: you have to choose between God’s word and Man’s reason. God’s word is obviously perfect (because they say it is), while Man’s reason is flawed and prone to error. Therefore, all true accounts of the history of the world will take into account the “primary evidence” found in the Bible. This is a theme throughout their museum: they present two views, one derived from the book of Genesis and the other from scientific research, and tell you you have to choose. I imagine it works for the usual yokels whose brains short-circuit at the idea of questioning God, but for me, it just confirmed that the Bible is bullshit — I choose reason and evidence every time.

2. They claim that all science involves interpreting the data, and that they use the exact same data that all scientists use — they just interpret it through the lens of a biblical worldview, while secular scientists interpret it through the lens of an evil, fallen, Satanic worldview. So which do you choose? Of course, they’re lying: the creationists throw away 99% of the evidence — everything that contradicts their predetermined conclusion — and the only bits of scientific observation they actually use are those where there is some ambiguity or potential for willful misinterpretation.

3. They claim that there are two kinds of science: observational and historical science. The only respectable kind of science, they say, is observational: where an eyewitness is present to actually see the results. Anything where you try to interpret past events is not subject to repeatable observations, therefore it can’t be determined, and should be rejected in favor of eyewitness accounts — especially God’s eyewitness account from the Bible.

Every one of those arguments is complete crap. But they do love to state them with definite authority, as if these are actual fixed laws of the universe that must be accounted for in any science, rather than post hoc rationalizations by charlatans trying desperately to put a false front of reason over their superstitions.

I want to address their third argument, though, because Ken Ham has been throwing it around lately.

Ham quotes Jerry Coyne dismissing the value of theologians in determining scientific truths (as Ham usually does, though, he declines to actually link to the article he’s supposedly rebutting — at least he does Coyne the courtesy of naming him, I’m usually just referred to as some “atheist professor from Minnesota”). And there it is, in flaming great display, the creationists’ peculiar understanding of how science works.

Coyne’s comment raises a couple of issues that are common with secularists, and I thought it would be good to address them. First, he confuses observational (or operational) science and historical (or origins) science. By claiming that only scientists can determine the origin of the universe, he is implying that it can be discovered through repeatable, testable methods—but it cannot.

No, Coyne isn’t confused at all. Scientists are fully aware of the difference between studying, for instance, changing allele frequencies in a population of fruit flies right now, and using historical evidence to infer changes in allele frequencies (actually, phenotypes) in extinct populations. What we deny, though, is that we can’t study those through repeatable, testable methods. Every lagerstätte is a sample of the species of an ancient world, and paleontologists are constantly making hypotheses, testing them against existing data, and seeking out new data to confirm or disprove their ideas. Physicists can aim their instruments at a series of stars and test their ideas about their makeup and history. These creationist kooks want to pretend that in the absence of scientific tools to study the past, they are therefore free to make up any story they want, and it’s just as valid as one founded on hard-earned evidence.

But if they reject the idea that we can know anything about the past by observing the present, what’s the alternative? Ken Ham continues:

Historical science is really just the process of trying to figure out what really happened in the past based on evidence existing in the present—or based on primary source of information. And you know, the best place to start is with an eyewitness account, or our assumptions may lead us in the wrong direction. Coyne’s assumptions are evolutionary, and he clearly does not see Genesis—the only record of an eyewitness account of our origin—as authoritative.

Right. The only stuff that counts is eyewitness accounts. “Were you there?” is their mantra, and it reflects a terribly naive understanding of science.

First of all, eyewitness accounts are the worst kind of evidence. What real scientists prefer is measurement or the collection of recorded data via known, well-calibrated instruments. I assure you, the scientists at the LHC aren’t putting on goggles and standing at a window looking at protons colliding — they’re storing many terabytes of measurements via sensitive instruments from every event. Even in my admittedly mushier work where I do use my eyes directly to watch developmental events, everything is recorded and stashed on a hard drive so I can later extract precise timings and measure intensities of probes.

Secondly, everything, not just the historical sciences, are inferential. All of our senses are flawed and impose biases on our observations — you may think seeing is believing, but ask any psychologist, and they’ll tell you that your brain is very easily tricked, and that any memory you might have of an event is largely a reconstruction. Ask any physiologist, and they’ll explain to you that your eyes are not cameras, but elaborate processing devices that filter visual information and pass it back to a cortex that further deconstructs and reassembles the patterns of light that fell on the retina into a model of the world around us. We repeat observations using multiple modes precisely because you can’t trust what your eyes tell you to be an accurate model of the external world.

Thirdly, and most obviously, why should we believe Genesis is an eyewitness account of our origin? Were you there, Ken Ham, when God wrote the book? What reason do you have for believing that a god wrote it, rather than teams of Jewish scribes…scribes who weren’t witnesses of the creation? You can bet Coyne doesn’t see the Bible as an authoritative account, nor do I; those of us who have studied the history of the Bible know that it was the product of humans, that it evolved over time as additions and revisions were made, that we can look at the text and see evidence of multiple authors in multiple eras, that its translations differ, that it contradicts itself in many places, and that the accumulated weight of objective evidence demonstrates that it was not poofed into existence by a supernatural being, but has a much more prosaic and earthy origin.

But, oh yeah, I forgot: Ken Ham rejects all historical sciences, even history itself, by claiming that they cannot determine anything. This is a belief he needs to hold in order to cling to his fatuous idea that the Bible was written directly by a myth wiggling the hands of the prophets.

I just wish he’d be consistent and admit that he believes the Bible is true in every word because he has faith, rather than trying to abuse science and redefine it to accommodate his preconceptions. He just lacks that much faith.