On the Scientific Feasibility of the Brain-in-a-Vat Hypothesis

The brain-in-the-vat (BIV) hypothesis was first seen as a thought experiment. However, recent advances in neuroscience, brain-computer interfaces (BCIs), and large-scale neuromodeling techniques have raised the question of whether such a system could be scientifically possible. This paper discusses the feasibility of the hypothesis from a biological systems and engineering perspective. It analyzes the physiological properties of the brain and evaluates the conditions required to maintain an isolated brain and generate coherent consciousness. The analysis shows that instead of acting as a dependent computational unit, the brain is integrated with metabolic, endocrine, immune, and sensorimotor systems, upon which the brain’s internal states and signal input interpretations are heavily dependent. Based on this situation, four minimal requirements are proposed: physiological maintenance, bidirectional neural interfacing, neuron states monitoring and regulation, and consciousness generation. However, current neural technologies are still far from the scale and understanding required to meet these conditions.