„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 full content is available in German, with selected core concepts available in English.
The Project
menschsein.ai is a personalist research artefact in three layers:
- A book in 67 sections, „What makes the human human” — accessible to non-philosophers, philosophically rigorous, anchored in the substance-ontological-relational tradition of Boëthius, Aquinas, Spaemann, Hildebrand, Wojtyła, Pieper.
- A formal description-logic ontology developed by the author over the past decade, encoding the foundation (capacity for truth) and the four faculties as a coherent axiom 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. - 254 networked concept pages, generated from the ontology and extended with philosophical commentary and source apparatus. The six concept pages most relevant to the AI-personhood question are translated into English.
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 in English
The following six concept pages 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
The full content of menschsein.ai is published in German, with structured English abstracts in the page metadata (socialDescription). A selection of core concepts is translated into English as listed above. A larger English translation 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 Personseins-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)