In this article, John Tillson discusses the conditions under which what he calls "knowledge insertion" would be desirable "for the one who has knowledge inserted." He argues that making use of knowledge insertion would not be cost free; in particular, it would come at the price of relationship goods realized through teacher-learner relationships, and of the "achievement" of learning, at least for the knowledge inserted. Despite these costs, though, Tillson concludes that knowledge insertion would "most often" be desirable since the losses could usually be more than compensated by the knowledge gained or would matter little so long as one realizes the relevant relationship and achievements goods to a satisfactory level at some point in one's life.