Ontogenetic Depth 2.0: The Prequel

Okay. First admit the obvious. Ontogenetic Depth (OD) 1.0 was — well, it would be beyond charitable to say utterly inadequate. I realized this not long after reading PZ Myers’ first wave of criticisms. As I’ll explain, however, my realization stemmed not from Myers’ specific points (most of which were either minor quibbles, or missed the mark completely), but rather from trying to apply OD 1.0 myself to the well-studied models systems of developmental biology. The OD 1.0 “metric” was no metric — measuring stick — at all. Thus, PZ’s general judgment in 2004, if not his specific criticisms, was dead accurate: “This is a poorly expressed and unusable idea.”

An Exercise on the Eve of Paul Nelson Day 2010

A few years ago, P.Z. Myers — with his Mencken-like genius for the memorable putdown — devised “Paul Nelson Day,” aka April 7, to record my annual failure to follow up on a promise to elucidate “ontogenetic depth,” a notion I floated in 2003. Much as I enjoy having my own day and all, I figured it was time to explain ontogenetic depth (OD). OD is just not that hard an idea to grasp, in one sense. In fact, OD is downright pedestrian, not much more than a fancy way of saying… Hey, wait a minute. Today is April 6. I still have a few hours to sort it all out. To warm up the audience, here’s an exercise. This Read More ›

Is Weather Forecasting A Counterexample To Complex Specified Information?: Jeff Shallit on Signature in the Cell

For over a decade, mathematician Jeffrey Shallit has been an outspoken critic of intelligent design. Recently, in a series of blog posts, he has attacked Stephen Meyer’s book Signature in the Cell (SITC) for what he sees as a variety of shortcomings. Some of Shallit’s criticisms merit careful attention, which we’ll present here in weeks to come. Other criticisms, however, are fluffy confections, failing to achieve even the slightness of what Hume called “mere cavils and sophisms.” Let’s look at one such bonbon of sophistry, Shallit’s claim that weather forecasting represents a devastating counterexample to SITC’s argument that complex specified information is, universally in human experience, produced by a mind or intelligence.

Seeing Ghosts in the Bushes (Part 2): How Is Common Descent Tested?

If that dictum looks like a bumper sticker, I apologize — but it’s true all the same. Most of the philosophy of science can be captured by a handful of bumper stickers. Anyway, keep the dictum in mind. In this second installment of the “Seeing Ghosts in the Bushes” blog series — part 1 is here — we’ll ask how the theory of common descent could be tested by fossils. The principle of “what evidence cannot question, evidence cannot support” will be our main guide.

Seeing Ghosts in the Bushes — Or How to Keep the Theory of Evolution from Breaking Your Heart and Driving You Crazy

What would be evidence against evolution, and very strong evidence at that, would be the discovery of even a single fossil in the wrong geological stratum….But not a single solitary fossil has ever been found before it could have evolved.Richard Dawkins (2009, pp. 146-7) Professor Dawkins is right: you can’t be older than your own grandfather, all country-western songs notwithstanding.