Heinrichs appears to be assuming that moderation usually signifies the most honest and rhetorically (and logically) sound argument. However, there would seem to be many situations in which people with extreme views really are right, and moderate people aren’t (for example, everybody should have “extreme” views about murder, slavery, or rape—everyone should be emphatically against these things). But regardless of the correctness of an extreme position, Heinrichs’ “extremism test” can still be useful, though maybe not in all the situations he proposes.