Been reading a bit and hearing a lot about Wagner of late… I know that the folksonomy thing has died down a bit now but this seems pretty relevant to the semilattice thing as well :o)
“Folk conceptions of the social order are frequently more complex and sophisticated than the matrices by which members of individual social science disciplines organize their work”[Ignorance in Educational Research, 1993]
Might I add organisations and learning management systems to that!