Split-Brain Confabulation and the Interpreter
Some split-brain studies suggest the brain can explain actions without direct access to their causes.
The Mechanism: Michael Gazzaniga and colleagues studied people who had undergone procedures separating communication between brain hemispheres. In some experiments, a speaking hemisphere offered explanations for actions prompted by information available to the other hemisphere.
The Philosophical Pivot: We may experience a unified self while relying on processes that are not fully available to introspection. The interpreter idea describes a function observed in specific experiments, not proof that every belief is invented after the fact.
The Horizon: These findings challenge simple accounts of conscious control, but they do not erase agency or responsibility. Understanding how decisions arise can make responsibility more nuanced rather than meaningless.
A confident explanation may be sincere and still incomplete. Intellectual humility includes recognizing that people, including ourselves, can mistake a plausible story for direct access to a cause.
The self may be less transparent than it feels without becoming unreal.
A reason can feel immediate and still be a reconstruction of what happened.
Which explanation of my own behavior feels obvious mainly because I have never tested what else could have caused it?