An enhancement brain-computer interface is a BCI whose purpose is to enhance the capacities of a healthy bearer beyond the species-typical normal range — memory, attention, reaction, direct machine control, continuous data feeding. The indication is not illness or injury, but optimization.
In terms of personhood ontology, enhancement BCI is not restitution. It does not aim at the restoration of lost conditions of actualization, but at surpassing the given actualization of the essential form. It thereby falls under the transhumanist reservation: it treats personhood as an optimizable substrate, not as a given essence to which respect is owed.
Ontological classification: Superordinate concept: brain-computer interface; disjoint with: therapeutic BCI; related to: transhumanism.
Three lines of problems
First line — intervention into the essential form. The substance ontology distinguishes the essential form (prote energeia) from its actualization (deutera energeia). Therapeutic augmentation intervenes cleanly at the second level: it makes possible operations that would otherwise not take place. Enhancement BCI, by contrast, alters what counts as a species-typically normal operation, and thereby indirectly claims an alteration of the actualization of the essential form. This is not technically impossible, but it is neither ontologically nor ethically harmless.
Second line — self-deification. The theological tradition (imago Dei, order of creation) holds that the person is not its own creator. Enhancement BCI treats personhood as material for self-fashioning. This shift — from the received to the constructed — is the fundamental operation of transhumanism. Pope Leo XIV, in his message to the Pontifical Academy for Life “AI and Medicine — The Challenge of Human Dignity” (message of 7 November 2025, congress 10–12 November 2025), expressly placed enhancement uses under the transhumanist reservation.
Third line — social inequality. If enhancement BCI becomes available on the market, a wealth gradient arises that couples cognitive capacity to purchasing power. This violates distributive justice and the equality of dignity.
Distinction from the therapeutic case
The dividing line runs along the indication, not along the technology. An invasive BCI implant is the same device whether it is implanted in a tetraplegic patient or in a healthy manager. What differs is the purpose and thereby the ethical assessment. The 2025 bioethics literature — Voices in Bioethics, Dignitas, Crisis Magazine, National Catholic Register — converges on this distinction, without falling into technological antagonism.
The temptation of the label
Providers have an incentive to declare enhancement applications as therapeutic, because that eases ethical acceptance and regulatory approval. Attention enhancement is sold as ADHD therapy, sleep optimization as sleep-disorder therapy, mood enhancement as depression therapy. Personal ethics must not let itself be deceived by labels: what is decisive is the actual constitution of the bearer, not the commercial description.
Methodological note
The rejection of enhancement BCI is not hostility to technology. It is the strict application of the distinction that also names therapeutic BCI as a positive good. Whoever rejects enhancement BCI outright, without appreciating therapeutic applications, fails the ethical capacity for differentiation just as much as the one who levels the distinction.
Sources: Generated by querying the Personhood ontology.
Further sources:
- Pontifical Academy for Life (2025): AI and Medicine — The Challenge of Human Dignity. International Congress 10–12 November 2025; message of Pope Leo XIV of 7 November 2025.
- Center for Bioethics and Human Dignity (2025): Brain-Computer Interface Technology’s Impact on Human Personhood, Identity, and Dignity. Dignitas 32 (3-4).
- Crisis Magazine (2024): The Catholic Response to Neuralink.
- National Catholic Register (2025): Neuralink vs. Imago Dei: What Catholic Anthropology Has to Say About Musk’s Tech and AI.
- Sandel, Michael J. (2007): The Case Against Perfection. Ethics in the Age of Genetic Engineering. Cambridge, MA: Harvard University Press.
- Habermas, Jürgen (2003): The Future of Human Nature. Cambridge: Polity Press.
See also
- Brain-computer interface
- Therapeutic BCI
- Transhumanism
- Technical augmentation
- Dignity
- Distributive justice
Generated by querying the Personhood ontology.