Debates about the links between science and ontology are very active in contemporary philosophy, and, in fact, they have always been present. Despite the various philosophical positions on the subject, they all admit the existence of a metaphysical reality. In contrast, metascience holds that such a reality does not exist. This second issue of Mɛtascience presents seven out of twelve articles that have as a common thread either the metascientific ontology or the Bungean ontology.