Discussing the Evolutionary Debunking Argument 7 May 2011 John Danaher at Philosophical Disquisitions has a blog anyone with an interest in philosophy should be subscribing to. John presents simple argument diagrams and clear analyses of philosophy papers, usually those that deal with philosophy of religion and related topics. Recently he has been discussing an argument by Guy Kahane of Oxford that evolutionary debunking arguments (EDAs) in ethics are problematic. I suggested that I’d like to read his critique of an EDA argument presented by Paul Griffiths and myself, and he has obliged. Here are the relevant links: On Evolutionary Debunking Arguments (Part One) On Evolutionary Debunking Arguments (Part Two) On Evolutionary Debunking Arguments (Part Three) Griffiths and Wilkins on Evolutionary Debunking Arguments (Part One) Griffiths and Wilkins on Evolutionary Debunking Arguments (Part Two) Paul E. Griffiths and John S. Wilkins When Do Evolutionary Explanations of Belief Debunk Belief? I will reply on John’s blog when I get time. Epistemology Evolution Philosophy Science EvolutionPhilosophy
Ecology and Biodiversity Ecological speciation 30 Sep 201118 Sep 2017 A new paper in the Journal of Evolutionary Biology (link below) assesses the possibility of speciation by ecological differentiation in conjunction with geographical isolation. The interesting thing here is that it takes two views previously considered as antagonists and combines them into a single model. “Standard” views of speciation assume… Read More
Epistemology Are humans, apes, monkeys, primates, or hominoids? 19 Mar 201221 Jun 2018 I suspect the correct literary answer is that we are Yahoos, but here I want to do what I would ordinarily never dare do: disagree with John Hawks. John takes Jerry Coyne to task for calling humans “apes”: Humans are hominoids. Hominoidea is a taxonomic group. Phylogenetic systematics holds that taxonomic… Read More
Epistemology Fishing for philosophy 11 May 2010 Okay, so my last response on Jesus as a philosopher didn’t satisfy Chris Schoen, but then nobody, least of all me or him, thought that I was going to be able to. But I find some interesting misunderstandings. Since the onus for communication lies with the communicator, this is clearly… Read More
Meh. I am in the middle of trying to sort out Gerald of Wales attempted debunking of Jocelyn of Furness’s claim that St Patrick drove all snakes and venomous creatures out of Ireland. Gerald is playing the “historical truth” card and looking to natural history and observation, but his motives seem more complex. This will get me utterly sidetracked and take some time to translate. Looks rather interesting!
An EDA is a special case of an NDA (naturalistic debunking argument), and the structure is this: P1: Claim A relies upon an exclusively non-natural explanation P2: There is a natural explanation for belief in A P3: When a natural explanation and a nonnatural explanation compete, it is more parsimonious to accept the natural C: The non-natural explanation is debunked [Note: not disproven, just undermined] If Gerald is giving a natural explanation for that which Jocelyn explains non-naturally, then he has undermined Jocelyn’s explanation. But the nonnatural explanation may yet be true; it is just that it is an unwarranted belief. This is quite distinct from what role the nonnatural belief plays, why it is important, and so on, which are a higher-level issue.
I’m not entirely happy with this way of getting at the kernel of the argument. Setting aside the fact that the truth of P3 will be highly sensitive to what is meant by saying that something is natural or nonnatural, which arguably can’t be taken for granted for large-scale domains like ethics, it seems a very large step from “It is more parsimonious to accept explanation E1 than to accept explanation E2” to “E2 is debunked” or “Claims based exclusively on E2 are unwarranted” This doesn’t seem to be at all a safe and reliable inference when it comes to parsimony because (1) parsimony is not the only factor to be weighed in determining whether a belief or explanation is warranted; and (2) parsimony admits of different, and not always consistent, measures. Do you really think it plays such a key role in the structure of these kinds of debunking arguments?
“If Gerald is giving a natural explanation for that which Jocelyn explains non-naturally, then he has undermined Jocelyn’s explanation.” Bradon’s point on P3 seems to be in play as Gerald has to take spontaneous generation as a factor at work when reaching his conclusion. But that just makes it more interesting rather than posing any major issues as these can be resolved small scale, case by case. This one runs surprisingly late well into the 20th century although the higher-level issue relating to belief are subject to considerable movement. The philosophical argument at the end of the day should be testable with enough individual case studies running with the issues. I suspect.
I’ve now added a discussion of Joshua Thurow’s paper on cognitive science and religious belief in case anyone’s interested. Here’s a link to all posts in the series: Evolutionary Debunking Arguments (Index)