Did Krugman Catch a Friedman Contradiction?

In this article published shortly after Milton Friedman's death, Paul Krugman critically examines the figure of the Chicago School economist as an academic and disseminator of free market ideas. The article is quite long, so I do not intend to undertake a thorough analysis of Krugman's take on Friedman. Yet there is one element in the article I would like to briefly address in the following lines.