Transdisciplinarity is defined by Basarab Nicolescu through three methodological postulates: the existence of levels of Reality, the logic of the included middle, and complexity.[9] In the presence of several levels of Reality the space between disciplines and beyond disciplines is full of information. Disciplinary research concerns, at most, one and the same level of Reality ; moreover, in most cases, it only concerns fragments of one level of Reality. On the contrary, transdisciplinarity concerns the dynamics engendered by the action of several levels of Reality at once.