Per the materialist/deterministic 'there is no free will' mental model, yes: the function taking the input stream is pure. On the per-event basis, this model b

Per the materialist/deterministic 'there is no free will' mental model, yes: the function taking the input stream is pure. On the per-event basis, this model boils down to a 'function' evaluating each event with multiple outputs and inputs: Inputs: the stimuli, mental state prior to stimuli Outputs: your actions and resultant mental state The output mental state is then the input for the next iteration/evaluation.