Disciplines have little or no epistemic basis: they are managerial entities, congeries of skills collected together at some point to address one or another problem, which then became ossified into institutional housings called departments. Disciplines mainly exist in textbooks taught to undergraduates.
If that’s the case, what do we say about the goal of translating across the disciplines? We are not building a bridge from one stable or ‘real’ entity to another rooted in the furniture of the world. We are dealing with a set of psychological and sociological facts, such as the epistemic institutional structures that have congealed over time and the egotism and insecurities of folks who believe that the area that they have been trained in constitutes the uniquely insightful way to address a given problem.
The functional unit or natural kind isn’t ‘discipline’. It isn’t even ‘skill’. It is logos–the ability to link one thing to another to another. and that moves seamlessly–or not–both within and across disciplines.