"The problem with panpsychism is not that it is false; it does not get up to the level of being false. It is strictly speaking meaningless because no clear notion has been given to the claim. Consciousness comes in units and panpsychism cannot specify the units." John Searle, NYRB, 10 January, 2013, 55, reviewing Christof Koch, Consciousness: Confessions of A Romatic Reductionist.
So, take that, Mr. Spinoza!