In elementary logic, from premises P1: If A, then B and P2: A, one may conclude B. This rule is called modus ponens. Evolutionary logic now has a particular application of this rule which it is attempting to foist on science as a whole. It runs as follows:
- P1: If a claim or idea seems to support ID, then it needs to be rejected even if previously you thought there were good arguments to support it.
- P2: The claim or idea seems to support ID.
- C: Therefore it needs to be rejected regardless of the sound reasons you previously thought supported it.
Here’s an example. According to Jack Cohen, Peter Ward has now gone back on his Rare Earth thesis (in Life as we Do Not Know It, Viking, December 2005) and now attacks the GHZ (Galactic Habitable Zone) thesis that he and Guillermo Gonzalez previously championed. Jack Cohen and Ian Stewart likewise reject it in Evolving the Alien (2002).
In this way, methodological cleansing — i.e., cleansing science from all traces of ID — is now replacing methodological naturalism as the premier rule of science.