Testimonial justification: Inferential or non-inferential?

Anti-reductionists hold that beliefs based upon comprehension (of both force and content) of tellings are non-inferentially justified. For reductionists, on the other hand, comprehension as such is not in itself a warrant for belief: beliefs based on it are justified only if inferentially supported by other beliefs. I discuss Elizabeth Fricker's argument that even if anti-reductionism is right in principle, its significance is undercut by the presence of background inferential support: for mature knowledgeable adults justification from comprehension as such plays no active role, and is superseded by inferential warrant. I show that her argument begs important questions. Inferential and non-inferential support combine to over-determine the justification of comprehension-based beliefs.