Jan-Hendrik Heinrichs

Reliabilism suffers from a problem with long sequences of justifications. The theory of justification provided in process reliabilism allows for an implausibly large extension of ‘justified belief’. According to process reliabilist theory, it is possible that a justifying cognitive process has an arbitrarily low probability of being successful and a justified belief an arbitrarily low probability of being true. This result violates reliabilism’s aims as well as our ordinary standards of justification.

Non-invasive brain stimulation promises innovative experimental possibilities for psychology and neurosci- ence as well as new therapeutic and palliative measures in medicine. Because of its good risk–benefit ratio, non-invasiveness and reversibility as well as its low effort and cost it has good chances of becoming a wide- spread tool in science, medicine and even in lay use. While most issues in medical and research ethics such as informed consent, safety, and potential for misuse can be handled with manageable effort, the real promise of brain stimulation does raise one prominent moral worry: it may lay the foundation of reliable, precise and stable manipulations of the mind. This article addresses this worry and concludes that it is not the possibility of manipulation, but the shift in our understanding of our mind which stands in need of careful consideration.