Libet Revisited: Reduction and Prediction in Neuroscience

In “Agent Causation” Timothy O’Connor makes a passing assertion that there are many unresolved questions for materialist agency as he posits it, and that many of these questions are empirical in nature and can only be resolved with “extensive advancements within neurobiological science.” [1] Two particularly salient questions are (1) “Precisely to what extent is an ordinary human’s behavior directly regulated by the agent himself, and to what extent is it controlled by microdeterministic processes?”[2] And (2) whether microdeterministic processes can be predicted or not. While O’Connor may believe that advances in neuroscience will reinforce rather than call into question his theory, this is not the case. Stretching from the 1980s to a recent study in 2008, neuroscience has demonstrated that predictive brain activity can be seen to occur prior to a test subject’s consciousness of making a decision. From Libet to present, these studies provide damaging replies to the questions which O’Connor’s theory leaves unanswered.

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