 Another, systematically more far-reaching aspect of Feigl’s (self-ascribed) shift from logical positivism to logical empiricism was his increasingly explicit embrace of a ‘realist’ approach to science and scientific theory construction. In Feigl’s own words: “Perhaps the most important and constructive aspect in the transition to Logical Empiricism was the element of empirical or scientific realism that became increasingly prominent in our views. Reichenbach and I had already opposed the phenomenalistic reduction during the twenties. In this regard we were closer to the views of Zilsel and Popper. We regretted that Schlick had abandoned his early critical realism, and we tried to reinstate it in a more defensible form.” (Feigl 1981, p. 80) At another place, Feigl indicates: “My own emancipation began in the middle thirties and was stabilized in the forties. Studies and teaching in the field of the philosophy of science helped me regain, refine, and buttress my earlier realistic position. I was also greatly encouraged by the scientific realism of Hans Reichenbach and the realistic epistemologies of my steadfast dear friends Roy W. Sellars and Wilfrid Sellars.” (Feigl1981, p. 39)