Political related research is a threestage process. Scientists are in charge of an epistemological phase where the object of its study is constructed. During a theoretical-logical phase, they must also clearly establish their research problems and formulate their hypotheses. And finally, there is a phase where different techniques are applied in order to obtain the information they require. This paper argues that it is during the first stage that defining whether it will be a qualitative or a quantitative analysis is supposed to be determined, but that pretending to choose only one of them is a false dilemma, for political science requires of both of them