  Not all, however, are convinced that quotations are flexible in just this way. Some have expressed skepticism both about the form of argument (see Cappelen and Lepore 1999a) and about the specific examples. Cappelen and Lepore (1999a) also argue that the multiple ambiguity view over-generates, i.e., it predicts that it is possible to express propositions with quotation sentences that it is not possible to express with such sentences. For further discussion, see also Saka (2003).