This article deals with the aims and the limits of the legal documents. The principal question to which this article tries to find an answer is whether it is possible to conceive a social fact only by considering its juridical aspects. The main hypothesis is that the legal documents does not always represent the social reality. In order to test this hypothesis, a comparative approach has been adopted and the cases of Poland and Turkey as a candidate to European Union membership has been chosen for the comparison. These two states have concluded two different types of association agreements with the European Community and also has made an application for full-membership. The integration level and the models stipulated in these association agreements are also quite different. On the other hand the level of integration and the closeness to the membership of these two states to the European Union in practice does not fit with the stipulations of the association agreements. By moving from the relations of Poland and Turkey with the European Union and by analysing in one hand legal and the other hand the practical aspects of it, this article aims to demonstrate the weakness of the juridical approach to seize a social fact.