• Do We Get to Know the Unknown?.- Part I: The Fugitive Nature of Ignorance.- The Tacit Dimension of Ignorance.- The Bubble Theses.- Cognitive Autoimmunity: Metacognitive Consequences of the Bubble Theses.- Part II: The Tenacity of Ignorance in Human Ampliative Reasoning.- Reasoning and Ignorantiam.- Of Habit and Ignorance.- Abduction: Enhancing Knowledge with an Ignorance-based Reasoning.- Ignorance-Based Mental Models: Thought Experiments, Metaphors, and Abduction.- Part III: The Social Diffusion of Ignorance.- Cognitive Niches: Knowledge Distribution and Ignorance Sharing.- The Toleration of Ignorance in Online-Communities.- Online Communities and the Distribution of Ignorance.- The Ignorant Cognition: Concluding Remarks.

“Ignorant Cognition is an ambitious attempt to develop a systematic approach to ignorance, covering a wide range of topics. I believe that Arfini successfully shows that ignorance must be studied from a holistic perspective … .  The book is solidly argued, and it combines ideas from several different disciplines in an interesting way. … it certainly worth the effort of those interested in ignorance from a cognitive, epistemological, or social perspective.” (Matías Osta‑Velez, Studies in Philosophy and Education, Vol. 40, 2021)“A philosophically valuable book and a welcome addition to the literature on ignorance. … To finish a philosophy book with a whole set of new ideas to explore in my own head, is a wonderful thing. I have my own interests in the small cognitive moments where ignorance and knowledge collide, and Arfini’s book has given me much to think about indeed.” (Samantha Copeland, Studies in Philosophy and Education, Vol. 40, 2021)