  A number of questions arise for the Neo-Carnapian. First, how are the internal and external readings to be distinguished? Second, how pervasive is the ambiguity? are there different readings not only for quantified sentences but for attitude- and truth-ascriptions as well? Third, what is the status of the Metaphysics 101 argument, given the two readings? The argument must be unsound when understood externally, but must it be invalid, or is it a valid argument with a false premise? If so, which is false? Fourth, how could philosophers regularly miss the internal/external ambiguity?