No Free Lunch?

https://barryhisblog.blogspot.com/p/no-free-lunch.html

William A. Dembski is a mathematician, beloved of cdesign proponentsists. He is known for his use, or I should say misuse, of David H. Wolpert and William J. Macready's "No Free Lunch" (NFL) theorems, which prove that no search algorithm can be more effective at finding fitness peaks in generalised fitness landscapes than blind chance. 

https://ncse.ngo/cdesign-proponentsists
https://en.wikipedia.org/wiki/No_free_lunch_theorem

Dembski has sold a number of books and made himself a name for himself among intelligent designer spotting nerds, keen to get a reputational boost from his credentials. However, Demsbki has a miserable record of serious publications compared with other mathematicians. 

https://pandasthumb.org/archives/2004/05/dembskis-mathem.html

What Dembski carefully neglects to mention is that Wolpert and Macready's theorems apply to the entire set of theoretically possible fitness landscapes. It should be no surprise that a hill-climbing algorithm, such as the selection of heritable variations, cannot perform any better than random chance when the general fitness landscape has no features or gradual inclines for "climbing mount improbable", as Dawkins puts it.

https://en.wikipedia.org/wiki/Fitness_landscape

Here is David Wolpert on Dembski's work. 

"I say Dembski "attempts to" turn this trick because despite his invoking the NFL theorems, his arguments are fatally informal and imprecise. Like monographs on any philosophical topic in the first category, Dembski's is written in jello. There simply is not enough that is firm in his text, not sufficient precision of formulation, to allow one to declare unambiguously 'right' or 'wrong' when reading through the argument. All one can do is squint, furrow one's brows, and then shrug." David Wolpert. http://www.talkreason.org/articles/jello.cfm

See also, https://barryhisblog.blogspot.com/p/no-evo-challenge-from-dembski.html in which Dembski accepts the principal concepts of evolution, but baulks at the idea that genetic "information" can arise without the intervention of his unidentifiable unnatural magical flying intelligent designer.