Archive for September, 2015

September 12, 2015

Recommending a podcast

by Neil Rickert

I follow the blog “Godless in Dixie”.  This morning there was a post about a podcast with the blog author on Aron Ra’s podcast site.

I rarely listen to atheist or religious podcasts.  When I do, too often they are the same old arguments.  But this one was different.  It gave me an insight in the mind of the YEC (young earth creationist).  So I’m recommending it.

Here’s a paragraph from the associated post:

We discussed how faith can make you accept intellectual defeat while thinking through doubts and questions, and we also covered how people can rationalize irrational things in order to preserve the beliefs they were taught to embrace (Hint: It has to do with inheriting a very low view of human nature).

I’ll note that when I check a short while ago, this episode did not show in the podcast index.  However, the youtube video on the linked blog post does work.

September 1, 2015

The “Random Genetic Drift” Fallacy — a review

by Neil Rickert

I often see suggestions that random genetic drift drives speciation.  I’m a bit skeptical of that idea.  In any case, a discussion developed elsewhere, and Will Provine’s recent book on the topic was suggested as reading.  I found the book interesting, though perhaps not decisive on the issues.  So I am still at the same point of skepticism as where I started.  But I at least have a better grasp of some of the issues.

I should add that I am not a biologist, though I have taken an interest in evolutionary biology.

What is random drift?

Let’s start by looking at the main issue.  The proponents of random drift seem to be suggesting that

  • there are near neutral mutations (neither benefiicial nor deleterious)
  • by random chance, some of those neutral mutations take over the population (the new genes become fixed).

That is the sort of drift that Provine is discussing.