Hans Albert, Versuch einer Antwort. Zu Heiner Ruttes Fragen an den kritischen Rationalismus; in: Geschichte und Gegenwart (2000) 19 (4), S. 243-248. 

In his answer to Rutte's questions to critical rationalism the author tries to show that some of the objections made against this view depend on an inadequate framing of the problem situation. If the problem situation is reformulated adequately as it has been proposed in Popper's later work Rutte's sceptical objection can be answered.