Science for the Public: The Brain-Computer Interface Paradox 05/2025. Brain computer-interface (BCI) devices are among the most promising medical innovations today. Individuals who are paralyzed or speechless due to injury or disease are able to learn to control motion and/or speech by means of a brain-computer-interface device. This can enable significant independence. However, brain chip devices might also be developed that would enable programs for mind control. Lukas Meier, Ph.D. (Fellow-in-Residence, Harvard University Center for Ethics) offers a comprehensive perspective –including technology, history and ethics—for ethical controls on BCI innovations