Kröner writes about the relation between physics and biology. He believes in an intermediary region between both sciences. He says that quantum physics is perhaps the first glimpse of this region.

Kröner makes some additional comments on their conversation of 14 July. He speaks about the contents of consciousness, phenomenalism and realism, reality in quantum physics, the borderline between science and the absolute. He opposes Weizsäcker's interpretation of experiments.