It doesn’t look like much, but it’s got a cute trick.
The busy beavers have been hard at work and have provided a complete transcript of that discussion between Jen McCreight, Rebecca Watson, Louis, Brownian, and me on Atheism+. Thanks!
Although…never, ever bother to read the comments on youtube. I went to get a link to the video, and found this amazing gem.
Uh, yeah. Elevator Guy ring a bell? It started out as a non-issue, then PZ Myers trumped up a storm and all of a sudden, Elevator Guy is a rapist, sexist misogynist son of a bitch bastard with white cisgender male privilege. Then she found all the traction in the world to make a mountain out of a molehill, and I’m sure she’s gotten more than a pretty penny from the whole debacle, and of course with support from PZ Myers himself.
We don’t even know what he looks like because she’s never said.
The distortions continue. I did not “trump up a storm”, and certainly did not say any such things about this elevator guy…and Rebecca Watson herself hasn’t said anything like that, either. It’s really bizarre to see how disconnected from reality the whispers have become.
It’s a shame I have to say that right from the beginning.
I’m beginning to develop a distaste for computer models of biological processes, which is a shame. From Andrulis to Fleury to Pivar, the field is tainted with people who don’t know a lick of biology but are good at inventing algorithms that go spinning off into never-never land, spawning odd and suggestive shapes that, in their happy ignorance, they assign to real organisms.
The latest is a guy named Eric Werner who, in a surprising change of pace, has a model that does not involve whorls, spirals, vortices, or toroids, the usual objects of crackpot obsessions, and is instead about inversions. He has a model for the production of skeletons, which is his, and which explains both exoskeletons and endoskeletons. “Exo”, “endo”, get it? All you have to do to turn one into the other is to turn the animal inside out.
That’s the other thing about these kinds of modelers — it’s got to be a really simple transformation that does the job all in one step.
An intriguing unanswered question about the evolution of bilateral animals with internal skeletons is how an internal skeleton evolved in the first place. Computational modeling of the development of bilateral symmetric organisms suggests an answer to this question. Our hypothesis is that an internal skeleton may have evolved from a bilaterally symmetric ancestor with an external skeleton. By growing the organism inside-out an external skeleton becomes an internal skeleton. Our hypothesis is supported by a computational theory of bilateral symmetry that allows us to model and simulate this process. Inside-out development is achieved by an orientation switch. Given the development of two bilateral founder cells that generate a bilateral organism, a mutation that reverses the internal mirror orientation of those bilateral founder cells leads to inside-out development. The new orientation is epigenetically inherited by all progeny. A key insight is that each cell contained in the newly evolved organism with the internal skeleton develops according to the very same downstream developmental control network that directs the development of its exoskeletal ancestor. The networks and their genomes are are identical, but the interpretation is different because of the cell’s inverted orientation. The result is inside-out bilateral symmetric development generating an inside-out organism with an internal skeleton.
My first thought was…an interesting suggestion. We know from the homology of the patterning molecules involved that vertebrates and invertebrates are upside-down relative to each other, so at some point an ancestor flipped (or more likely, the ancestor was morphologically ambiguous in the dorsal-ventral axis), so let’s think about whether that’s feasible. And then my second thought was…wait, no way. That makes no sense at all.
So I read the paper. I was right, it makes no sense at all.
First thing I noticed was that the acknowledgements thank Francis Hitching, a notorious crank, Martin Brasier (no problem there, he’s a paleontologist specializing in Cambrian evolution…but also not a developmental biologist), and Cellnomica, a company that makes the modeling software. I looked. Eric Werner is the president and CEO of Cellnomica, which sort of means he was happily thanking himself for allowing him to use his software, which is nice, I suppose.
But except for Brasier, I’m already unimpressed. That doesn’t matter, though; he will sway me by the data and the evidence, right?
Next problem: there isn’t any. This is one of those totally evidence-free papers; the author didn’t bother to look up anything about the induction of skeletal elements in arthropods and vertebrates, cites nothing but three (!) papers all written by Eric Werner (!!), all published unreviewed in arXiv (!!!), and builds everything from a simplistic premise about how axis information is inherited epigenetically in dividing cells. There actually is a substantial literature on the inheritance of the orientation of cytoskeletal elements in dividing cells in flies and nematodes, for instance — but it’s not as trivial as what Werner proposes, and he doesn’t cite any of it, anyway.
The whole thing consists of the graphical output of simulation runs on his software, like this:
He hasn’t even questioned his premises. Is there evidence of cells producing mirror-image progeny (actually, I recall that there is…but it’s not quite as uniform as he proposes)? Is there reason to think from, say evidence in the fossil record, that ancient chordates are inside-out arthropods? Nope, and Brasier should have been able to tell him so. Is there developmental evidence that this is how skeletons form? For instance, are the progenitors of internal skeletons homologous to the cells of the arthropod cuticle that produce there exoskeleton?
And that’s where I stopped and told myself, “obviously not”. The arthropod cuticle is produced by ectodermal cells that produce chitin. If you turned one literally inside out, the ectoderm would become the endoderm, the lining of the gut…a phylogenetically ancient tissue with homology between arthropods and chordates. It does not produce the chordate skeleton. That job is done by mesodermal derivatives…a tissue that forms in roughly similar ways by ingression/involution of cells during gastrulation in both groups. Mesoderm forms muscle and connective tissue in both arthropods and chordates, and produces bone and cartilage in addition in chordates.
The story is complete abiological and ahistorical bollocks. It’s really nothing but a pointless exercise in making a computer program run its paces, and is about as relevant to evolution as Spore, another game that attempted to model a science and failed abysmally.
It also makes me curious about something else: it was published in arXiv, which is mainly a repository of physics papers, with some abstract biological/mathematical stuff trickling in. Is the physics collection as plagued with drivel as the few samples of biology papers I’ve seen shoveled in there?
Werner E (2012) How to Grow an Organism Inside-Out: Evolution of an internal skeleton from an external skeleton in bilateral organisms. arXiv:1207.3624v1
(via Tommy Leung)
I just ordered Hitchens’ Mortality; it’ll be out next week. I’m very much looking forward to it in a grim sort of way. You can read the last chapter right now, and incoherent and scattered as those terminal jottings are, it’s still marvelously well-written. My favorite quote so far?
If I convert it’s because it’s better that a believer dies than that an atheist does.
You know the whole book is going to be full of those.
It is so revealing that James Croft is offended that some atheists have the impression that secular humanism is a religious idea.
In the ongoing discussions around Atheism+ and its relationship with Humanism one issue crops up again and again: the perception that Humanists – at least some Humanists – have an attitude toward religion which the atheists who are excited by Atheism+ do not share. This is often expressed as a reason why a given blogger does not identify as a Humanist, or why they prefer the Atheism+ label to Humanism.
He quotes me. My comments were specifically directed at the Harvard Humanists, not secular humanism — I identify as a secular humanist myself, and there ain’t one germ of religious feeling anywhere in my body. This is another thing that pisses me off about the Harvard Humanists: they no more represent the entirety of humanism than I do the entirety of atheism, but they so easily assume that they do.
For the record, I have no disagreement at all with way most humanists address religion; the major organizations, like the American Humanists and the British Humanist Association, are just fine and dandy, and just as godless as I am. But some do take an awfully admiring view of religion, and unfortunately, they’re the same ones who think they are the be-all and end-all of secular humanism.
Another child-raping pedophile has been arrested: Caleb Hesse. He’s been busily raping little boys for 30 years.
He’s nobody famous, and his history is totally unsurprising.
An anti-gay activist and donor to California’s Proposition 8, 52-year-old Hesse was a teacher at the Morongo Unified School District who was recently teaching first grade at the Friendly Hills Elementary School.
According to KTLA, the incidents occurred mostly during Hesse’s overnight volunteer trips with the church. Hesse allegedly met many of his underage victims during these outings. Authorities believe the most recent crimes occurred as early as last week.
OK, teaching elementary school was unfortunate, but taking advantage of church trips to abuse children is weirdly typical. School administrators will stomp down hard on any offenses, but churches seem to have a far, far wider range of tolerance of adult male’s behavior.
I don’t understand how this works, though. Thirty years of screwing little boys, and no one noticed? Or more likely, no one cared enough to stop him?
Sorry. I just can’t bear it. My wife wanted to make the effort, and I grumbled and delayed and finally handed over control of the remote (I had a lecture to write anyway), but I was amused to see she turned it on during Santorum’s speech and only lasted about five minutes…she decided the weather news was far more interesting.
So I looked elsewhere for summaries. Salon caught Santorum’s dogwhistle speech.
Chris Christie got tapped to make the keynote attack on President Obama, but Rick Santorum was assigned to throw out some of the reddest meat at the GOP convention: about the way Obama supposedly gutted the work requirement for welfare (he didn’t).
And in case anyone was in danger of missing the racial subtext, Santorum linked Obama’s waiving the work requirement (he didn’t) to “his refusal to enforce the immigration law.” Welfare recipients and illegal immigrants, oh my! Santorum made sure to scare the white working class with the depredation of those non-white slackers and moochers. It’s 1972 all over again.
Yeah, Republicans are racist. They ought to just be open about it and call themselves the White People Party.
The best summary comes via physioproffe: Gin and Tacos’ “AN ASTONISHING PANAROMA OF THE ENDTIMES”. I get the impression they had to bring on Ann Romney because she’s the only person willing to make a speech about Mitt.