This chapter summarizes the results from Chapters 4-8 and speculates on a question that is posed at the start of the book: Why is it that Milgrom’s theory, in spite of its remarkable successes, has been so widely ignored by standard-model cosmologists? It is argued that the approach of standard-model cosmologists to theory corroboration is different from that of Milgromian researchers: the first behave like verificationists, the second like critical rationalists. Unlike Milgrom’s theory, the standard cosmological model has made few if any successful novel predictions, and so it is understandable that standard-model cosmologists have gravitated toward a methodology that favors verification over critical rationalism.