There does seem to be a problem in neuroscience in finding a language suitable for describing brain activity in a way which could lead to deduction, evaluation of theories,and even perhaps calculation. This is especiallyso when dealing with questions of global activity, as against activity of individual organs or cells. How can we bridge the gap between neuronal activity and what are variously described in the literature as percepts,concepts, thoughts, emotions, ideas, and so on? What are therelations between the meanings of these variouswords? When should we use one rather than another?