I thank Adelson Pinon for the interest in my article. We agree that the message of my article was to criticize retrospective power calculations.
Pinon focuses on the definitions of statistical power, and claims that my definitions are incorrect. He defines statistical power as the long-term probability of rejecting a false null hypothesis, given the population effect size, a significance level, and a sample size. I completely agree with Pinon that this is a correct and precise definition of statistical power. But I do not agree that my definitions are incorrect. Rather, they are less precise. There is a limit to which level of precision is purposeful in an article in the column “Medisin og tall”.
I thank Pinon for adding the more precise definition in his comment.