  Prichard is here endorsing the KK-thesis, i.e., the thesis that knowing implies knowing that one knows. Philosophers who endorse what we can call knowledge internalism accept something akin to what Prichard endorses, though their main focus is slightly different. That is, knowledge internalism concerns not knowing that one knows, as in Prichard, but rather knowing or being aware of that on the basis of which one knows. For example, imagine that you know that a flock of Canada geese has landed in a neighborhood park in your city; and suppose that you came by this piece of knowledge on the basis of and as a result of some testimony from another person who has just returned from that park. Then knowledge internalism would be the view that in knowing that the geese are in the park, one also knows or is aware of that on the basis of which one knows, namely, one is aware of the testimony on the basis of which one has knowledge of the geese. Or, more plausibly, one could become aware merely by reflection of that on the basis of which one knows about the geese.