“As to the materialist’s straw man, he is [French philosopher René] Descartes. ‘Cartesian dualism’ is the accusation hurled at anyone who recognizes that consciousness is real and has real effects. But the error in Cartesian dualism lies in its reification of consciousness—in making it into a substance, res cogitans, rather than in merely acknowledging the existence of consciousness and its causal efficacy.
“Consciousness is not an entity, not in the sense that a stone or an organism is. Consciousness is a faculty of an entity, a man or animal; the operation of consciousness is a process of that entity.
“Actually, Descartes’ mistake here lies, ironically, in his being too affected by materialism: he attempts to apply to consciousness a category derived from the physical world: the category of substance or entity. In dividing reality into res cogitans and res extensa, he forgets that res means ‘thing,’ a concept that derives from perceiving solid, physical objects. Nothing but confusion and contradictions can result from likening consciousness to physical objects.”
~ Harry Binswanger, from his book How We Know; Chapter: 'The Causal Efficacy of Consciousness'
[Hat tip The Verma Post]