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In light of this recent thread I have decided to give another listen to this episode, and am slowly developing a better understanding of what is going on with the word 'cognition'. Dr. Glidden expressly contrasts the cognitive with the physiological. In humans it's difficult to demarcate these two faculties, in part because they are very intertwined. But taking a lower order of life like the spider plant on my balcony, I can make several observations. Does it experience sensation? I suspect so. …

Thank you, HsiehKW, that is a very thorough response and I will have to read it again more carefully tomorrow! In response to your last paragraph, I agree that plants are not cognitive; I cite them merely in a thought experiment, in order to outline the operation of prolepsis as non-cognitive. The inclusion of prolepsis in the Canon seemed to require a process linked to sensation and rooted in physiology, which I tried to take as nearly as I could to its hypothetical extreme. Your division of pr…