ABSTRACT
In saying this I too am talking of external things, namely, people and their nerve endings. Thus what I am saying applies in particular to what I am saying, and is not meant as skeptical. There is nothing we can be more confident of than external things-some of them, anyway-other people, sticks, stones. But there remains the fact-a fact of science itself-that science is a conceptual bridge of our own making, linking sensory stimulation to sensory stimulation; there is no extrasensory perception.
