Franck encloses a reprint of an article by Niels Bohr (not present). Although BR had earlier agreed to meet Franck (who was at the University of Chicago), Franck had not called him because "it would not be right for me to play the defender of the point of view of men like Bohr, Heisenberg, etc., in a discussion with a philosopher like you to whom I cannot be a comparable opponent." Franck agrees with the article by Bohr.