How Can We Know What We Don't Know?

Last month's "Nuts and Bolts" column "Buy or Build? and hte decisionmaking folwchart included there, sparked an interesting comment from a reader: " Sometimes organizations go to great trouble and expense to build (often inferior) eLearning in-house becasue they don't really know what their other options are." I explore this further in this month's column:   How Can We Know What We Don't Know?