Therefore, the deterministic nature of digital machine operations is not an intrinsic or necessary feature that distinguishes them from humans in a non-deterministic world.

Suppose, first, that we focus on the question of whether there are sets of rules that describe what a person and a machine “will” do in every possible set of circumstances. If the world is deterministic, then there are such rules for both persons and machines (though perhaps it is not possible to write down the rules). If the world is not deterministic, then there are no such rules for either persons or machines (since both persons and machines can be subject to non-deterministic processes in th