Other motivations to be trustworthy might not be so readily mimicked by institutionally devised incentives, especially if those motivations are not matters of simple incentives. When these motivations are at work, trustworthiness might be overdetermined in the sense that one of these motivations might be coupled with encapsulated interest. Hence one might say that one or the other of these is the essential reason for the trustworthiness. In truth, however, parsing the motivations would be quite difficult unless we could compare the same person's behavior over a wide range of interactions.

DEFINE: Introduces the idea that trustworthiness can be 'overdetermined' — multiple motivations coupled with self-interest, making the essential reason hard to isolate without observing a person across many interactions.

Russell Hardin, Trust and Trustworthiness, loc. 282