In a recent series of articles, and in his latest book, James Cornman has proposed and defended a definition of ‘observation term’. The original definition appeared in [3]; in [4] Cornman defended this definition against some criticisms offered by P. K. Machamer, and also revised it somewhat; the revised definition is restated in [2] and used there in Cornman's discussion of the identity theory of the mind. Finally, in [1], Cornman again invokes his definition in defending scientific instrumentalism, and defends (...) it against various generalized attacks on the very possibility of drawing a distinction between observational and theoretical terms which will do the sort of work Cornman wants it to do. (shrink)