 Taking ontology to be part of the implicit knowledge of grammar may also solve the puzzle of how it is possible for a speaker to reject upon reflection (part of) the ontology that is implicit in natural language while still committing herself to it through the continued use of the language. On such a view, the implicit acceptance of the ontology of natural language would not be a form of belief, but rather a form of tacit knowledge on a par with that of grammar (Moltmann 2020a). This would explain the robustness of such a form of implicit acceptance, which resists rejection upon reflection as long as the agent uses the same language, unlike the implicit acceptance or bias in ethics, for example, which does permit rejection upon reflection (see entry on  implicit bias).