Professor Cohen makes extensive reference to a lecture “Hypotheses relating to the brain-mind problem” which was published in Nature (July 14th, 1951). He gives a succinct account of the suggestions that I put forward, and then goes on to state that they “illustrate two fallacies which are to be found in so many contributions to the study of the body-mind relationship.” Be that as it may, but Professor Cohen has chosen most unsuitable illustrations, for in both cases they are based on misunderstandings of my article.