Bernard Mayo

The Incoherence of Determinism

Of the many possible, and no doubt actual, forms of incoherence covered by my title, I shall be concerned with only one, and must begin by dismissing the others. The incoherence I shall speak of is not any alleged inconsistency between deterministic and indeterministic physical theories , such as between classical particle mechanics and quantum theory. It is an inconsistency internal to determinism. Not, that is, internal to any deterministic theory ; but to the general claims put forward by determinists—whether scientists, philosophers, or laymen. Still another qualification—it is ‘hard’ determinism I shall be concerned with—‘hard’ in the sense in which William James distinguished between hard and soft determinism. Soft determinism James himself ridiculed as glaringly incoherent, and in any case I shall not be specially concerned with determinism as regards human conduct—with the problem of free will and responsibility.