To select as the subject of a study of limited size a topic as fundamental and, additionally, one so long discussed as has been the case with literary practice greatly risks—and we are fully aware of this—appearing to be an undertaking which is both presumptuous (how many studies, sometimes major ones, have been devoted to this question during recent decades?) and doomed to failure (is it serious to presume, in a few pages, to deal, even partially, with so vast and so complex a subject?). However, one precise reason causes us to think that it is time, today, to re-examine this ancient problem in new terms. The field of French literary research is at present characterized by a major institutional and ideological fact, the massive reality of which certain particular or collective efforts, no matter how remarkable these might be, cannot cover over. An airtight seal continues to separate, globally, traditional literary research from recent studies produced by certain linguists and speech historians in the domain of linguistic practices. Whence this scientifically paradoxical consequence: studies dealing with fundamentally similar objects—discursive practices—are presently being conducted in parallel, on the basis of theoretical premises which are radically opposed in most cases, with each one almost absolutely ignorant of the others. This situation, we believe, is exceedingly harmful to literary research. By making all interdisciplinary relation impossible as well as inhibiting certain questioning necessary within the realm of this research, it contributes to blocking progress in large measure. Need we point out that we nourish no naive hopes of overturning within the space of a few pages a situation whose roots, both institutional and ideological, are so deep? Nor does one distinguish oneself more by providing definitive answers for these basic problems which we propose discussing here, answers which one might even believe possible to guarantee as fully correct. We would only like to attempt to prove, by re-examining in new terms some fundamental problems of literary theory, the advantage which this theory might be able to find in certain data drawn from linguistics and the “analysis of discourse”, and inversely to propose certain theoretical readjustments which a specific reflection on literary practice seems to make necessary in the field of these two disciplines, particularly in that of the second. The pages which follow should, therefore, only be taken for what they are: an attempt, limited in its scope and problematic in its conclusions, to break down some barriers and to open a breach at certain critical points.