Muller, F.A.; van Fraassen, B.C.; History and Foundations of Science; Dep Natuur & Sterrenkunde
In this journal, Dicken & Lipton  argued, following Musgrave , that a constructive empiricist cannot coherently draw the distinction between observable objects (events, processes, …) and unobservable ones. We argue to the contrary: the distinction can be drawn coherently, but add a qualification to deal with an associated problem concerning the language of science.