„What makes the human human?” This site presents a substance-ontological-relational concept of personhood — a philosophical and ontological project carried by Raphael E. Bexten. It addresses the question of human uniqueness in the age of artificial intelligence, brain organoids, and synthetic embryo models. The site is now available in full in both English and German: the complete book What Makes the Human Human (all 67 sections), all 364 concept pages, and 50 thinker portraits.
The Project
menschsein.ai is a personalist research artefact in three layers:
- A book in 67 sections, What Makes the Human Human — now available in full in English — accessible to non-philosophers, philosophically rigorous, anchored in the substance-ontological-relational tradition of Boëthius, Aquinas, Spaemann, Hildebrand, Wojtyła, Pieper.
- A formal ontology developed by the author over the past decade, encoding the foundation (capacity for truth) and the four faculties as a coherent, machine-checkable system. The ontology source is held privately as a long-term scholarly research instrument; the substantive results derived from it are made public through the conceptual layer at
menschsein.ai, peer-reviewed articles, and forthcoming monographs. - 364 networked concept pages, generated from the ontology and extended with philosophical commentary and source apparatus. All concept pages are available in English (see the Concepts Overview).
The substantive philosophical contribution is a categorical, non-gradualist account of what makes human intelligence unique: the capacity for truth as foundation, and four faculties unfolding from it — understanding and insight; reasoned ethical judgement; assumption of responsibility; affective value-response (Hildebrand’s the heart as third spiritual centre).
Six Core Concept Pages
All 364 concept pages are available via the Concepts Overview. The following six encode the substantive AI-personhood argument:
- Conception of Intelligence — six traditions of the determination of intelligence as a definitional family
- Bearer of Intelligence — seven classes of bearers (substantial, emergent, hybrid, artificial, ontologically uncertain) with the methodological pointe against reductionism and premature denial
- Substance-Ontological Conception of Intelligence — Aristotle, Aquinas, Spaemann; intellectus as faculty of the rational soul; first and second actuality; complementarity to the empirical-functionalist conception
- Ontologically Uncertain Bearer of Intelligence — brain organoids, advanced LLMs, synthetic embryo models; in dubio pro persona; the asymmetry of the burden of proof
- Truth-Apt Act — the propositional act of claiming with first-person assumption; the categorical distinction between human, animal, machine, swarm
- Four Faculty-Limits — capacity for truth as foundation; understanding, ethical judgement, responsibility, affective value-response (Hildebrand) as the four faculty-limits between human intelligence and artificial systems
Plus the methodological orientation: About the Method and the consolidated Bibliography.
Note on Languages
menschsein.ai is now published in full in both German and English: the complete book What Makes the Human Human (all 67 sections), all 364 concept pages, and the 50 thinker portraits (see the Table of Contents and the Concepts Overview). A further English-language programme (Volume 2: Truth-Capacity as Foundation; Volume 3: The Heart of Intelligence) is planned for 2027 – 2029, in cooperation with the Hildebrand Project at Franciscan University of Steubenville (Crosby & Crosby).
Author and Institutional Anchor
Raphael E. Bexten (PhD, Catholic University of Eichstätt-Ingolstadt 2017) is a personalist philosopher and the author of the Personsein-Ontologie at menschsein.ai — a substantial formal personalist ontology that he has built and maintained over the past decade. He is the editor of AEMAET, a peer-reviewed journal in personalist philosophy. His scholarly orientation is in the Hildebrand-Spaemann-Wojtyła tradition.
Contact
- Email: [email protected]
- AEMAET: https://aemaet.de
- German content: https://menschsein.ai
- All concept pages: Concepts Overview (German)