This volume contains the first critical edition of Girald Odonis (d. 1349), De intentionibus, in which the author deals with the multifarious problems around conceptualization with which philosophers and theologians from around 1300 were faced when attempting to bridge the gap between thought and reality. Girald appears to have been an unyielding defender of the 'realistic' position, holding that our variously articulated concepts (intentiones) are representative of as many distinctions in Reality. The main target of his severe criticism upon contemporaneous views of the matter is Hervé de Nédellec, who was the first to write a monograph De intentionibus, which betrays his adherence to a moderate realism. The editor's extensive study of the intentionality debate of those years focusses on the development of the cognition theory in the period between Thomas Aquinas and Peter Auriol (d. 1322).