My only knowledge of Henri Bergson is from perhaps a less intellectual source, the Monty Python sketch 'Spot the brain cell': Cleese: ... Well your first quest

My only knowledge of Henri Bergson is from perhaps a less intellectual source, the Monty Python sketch 'Spot the brain cell': Cleese: ... Well your first question for the blow on the head this evening is: What great opponent of Cartesian dualism resists the reduction of psychological phenomena to physical states? Jones: I don't know that! Cleese: Well, have a guess. Jones: Henri Bergson. Cleese: Is the correct answer! Jones: Ooh, that was lucky. I've never even heard of him.