Friday, February 28, 2014

Adventures in evolutionary psychology

Jeff can't seem to make up his mind on whether evolutionary psychology is a reliable or unreliable belief-producing process. 

On the one hand:

 HADD is an acronym which stands for “Hypersensitive Agency Detection Device.” HADD is a theory in the cognitive science of religion which says that most humans seem to be hard-wired to believe that agents explain various facts; this tendency seems to include all sorts of invisible agents, including God, gods, ghosts, and so forth. 

Here’s one reason to think (3) is true, what I call the “HADD Produces Many False Positives” argument. This argument focuses on the letter “H” in the acronym HADD: most humans not only have a mental tool called an “agency detection device” (ADD), but this device is literally hypersensitive. Given ambiguous information, most human brains have a tendency to err on the side of assuming that an agent–maybe even an unseen or invisible agent–is responsible for the ambiguous information. This mental tool has survival value because it causes people to be on guard against potential predators. Furthermore, it’s better for ADD to err on the side of false positives than on the side of false negatives. So because HADD generates so many false positives, it is unreliable. On the assumption that naturalism is true (and humans are the result of unguided evolution), this is just what we would expect. If naturalism is true, nature is “blind” and so is indifferent to our beliefs about a non-existent God.

On the other hand:
This is Plantinga’s well-known “Evolutionary Argument Against Naturalism” (EAAN).
1. The basic problem with the argument is that it’s false that “Given materialism and evolution, any particular belief is as likely to be false as true.” Rather, as Draper pointed out in his debate with Plantinga, “More generally, the long term survival of our species is much more to be expected if our cognitive faculties are reliable than if they are unreliable, and that entails that the long term survival of our species is strong evidence for R.”
2. Furthermore, “In addition, it is very unlikely that belief-producing mechanisms that do not track the truth would systematically promote survival in a very diverse and often rapidly changing environment.”

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