Much recent empirical work in the developmental sciences has emphasized the importance of cultural knowledge transmission for the processes of human evolution and development. This body of empirical work provides indirect support for the “knowledge economy framework” developed by John Greco in his book The Transmission of Knowledge. In doing so, however, it also raises questions concerning the scope or generality of Greco’s framework. Whereas Greco contends that testimonial knowledge transmission is paradigmatic of the process of knowledge transmission generally, this (...) empirical literature recognizes a variety of non-testimonial forms of knowledge transmission, many of which function in ways that are importantly different from outright testimony. This leaves us with some decisions to make concerning the extent to which we wish to tie the concept of knowledge transmission to the topic of testimony and concerning how to characterize the various non-testimonial ways in which knowledge gets around within epistemic communities. (shrink)