Knowledge resulting of the interpretation by an individual of information, it cannot always be handled as an object. Indeed, we create knowledge when filtering information through ours interpretative frameworks. The commensurability of interpretative frameworks is an abstract concept, relying on a quite unclear rule: higher is the probability that the same information will have the same meaning for several people, more commensurable are their interpretative frameworks ; lower is that probability, less commensurable are their interpretative frameworks. The purpose of this thesis is to propose approaches in order to determine to what extent two individuals will give the same meaning to the same information.
