He posited a  (*)"rabbit-fly" that can only appear in the presence of rabbits in his analysis of the word "Gavagai".
This thinker argued that philosophers should make "free use" of science and that in doing so the normative becomes descriptive, as in other types of engineering. In one work, he recounted Neurath's parable of the mariner who has to rebuild his boat while afloat in it, and praised Carnap's "The Logical Structure of the World" for developing the "conceptual" side of a discipline. He posited a  (*)"rabbit-fly" that can only appear in the presence of rabbits in his analysis of the word "Gavagai". He analyzed the sentence "Everything green is extended" in another work where he compared the terms "bachelor" and unmarried man." He wrote that the titular discipline should be treated as a form of psychology in one work, and in another he attacked the analytic-synthetic distinction. For 10 points, name this author of Word and Object and "Two Dogmas of Empiricism."
This thinker argued that philosophers should make "free use" of science and that in doing so the normative becomes descriptive, as in other types of engineering.
Willard van Orman Quine