The purpose of this article is to point out the historical reasons why W.V. Quine’s article Two Dogmas of Empiricism should be read not as an attempt to criticize the characteristic theses of logical positivism, but as an attempt to reject the conceptual analysis based on the unclear concepts such as ‘analytical’, ‘synonymous’ and ‘meaning’. Instead of the conceptual analysis, Quine proposed the methods of explication and paraphrase. These two methods are useful for clarifying and simplifying the conceptual apparatus in which scientific knowledge is formulated.