The Surveillance of the Subconscious
Eye tracking and biometric signals can infer limited states, not read the mind without bounds.
The Mechanism: Eye-tracking and biometric systems measure signals such as gaze, pupil movement, or heart rate. These signals can support limited inferences in context but do not provide direct, reliable access to a person's subconscious thoughts.
The Philosophical Pivot: Turning bodily responses into data can make inner life appear measurable from the outside. A proxy may be treated as truth even when it is ambiguous, context-dependent, or shaped by disability and environment.
The Horizon: As sensors enter workplaces, devices, and public spaces, consent and purpose limits become crucial. People should not be judged by involuntary signals interpreted without their knowledge or a chance to respond.
The rhetoric of mind-reading can itself be coercive, giving institutions unjustified confidence in their ability to infer intent. Biometrics require humility as well as security.
Privacy protects not only what people choose to reveal but also the right not to have uncertain signals turned into a story about who they are.
A signal from the body is evidence of a signal, not automatic access to the mind.
What would I want others to understand before interpreting a bodily signal as proof of what I think or feel?