So this turned into a some kinda bloggy post thing. I can't vouch for any the ideas in here because I'm hopped up on caffeine and ibuprofen.
Garfinkel's classic "trust" paper which discusses how sociologists and practically engage trust as something observable and reportable. It is fundamentally a discussion about method, and how formal analytic/theory, cannot make render visible issues of trust. I think this speaks directly to Alan's point that humanities have no methods for engaging trust: [Garfinkel, H. (1963), 'A Conception of, and Experiments with 'Trust' as a Condition of Stable Concerted Actions', in Harvey, O. J. (ed), Motivation and Social Interaction, New York: Ronald Press, 187-238.](http://books.google.com/books?hl=en&lr=&id=c6Quh3jbt8YC&oi=fnd&pg=PA379&dq=garfinkel+trust&ots=HoNZhYSWX8&sig=degJPylllzk_I4R00YPlpUJPu-c#v=onepage&q