Friday, 26 September 2008

Dysteleology

Evolutionists often argue against a designer by pointing to poor design in plants, animals, and humans. In his recent book By Design, Jonathan Sarfati makes the following points (my paraphrase):
  1. This is not a scientific argument, it is a theological one. It is not saying anything about design but about the designer.
  2. The examples offered are usually not bad design but a problem with our ignorance. We don't understand the design. If we understood the full function of the organ then the good design would be obvious.
  3. Features need to be considered together and not in isolation. It is not one aspect that is being optimised but several.
These are profound points.

As an analogy consider a car, an object that is designed.
  1. Pointing out why you think a car functions suboptimally does not prove the car is not designed, it says that you think the designer did a poor job.
  2. Not understanding how spoilers work does not mean their presence is poor design, rather it reveals good design when you becomes aware of flow dynamics.
  3. Designing for speed and crash safety are competing themes. The fastest car may be unsafe in a crash. The strongest car may be slow. A car may be optimal for speed, safety, space, and fuel efficiency; though not maximised for any single one of these features.

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