I've no idea who Michael Miles is, but yes, it's Python alright (from the "Spot The Brain Cell" sketch, with contestant Mrs. Scum). However, the answer to the question posed is, indeed, Henri Bergson, who I've never heard of. Silver medal to dgbear, then, but Smoothbody2 - you get to set the next question.
This one's a little tongue-in-cheek:
Which great opponent of Cartesian dualism resists the reduction of psychological phenomena to a physical state and insists there is no point of contact between the extended and the unextended?
And (as a clue) for bonus points, in which game show was this question originally asked?