Pauli explains his use of the adjectives "positivistic", "realistic", "idealistic" and "phenomenalistic" as logically linked aspects of the world and as corresponding features of a theory.

Referring to Bohr's lecture "On the unity of knowledge", Pauli mentions his misunderstandings with Bohr concerning the concept of the "detached observer", the concept of reality in atomic physics, Bohr's conception of "complementarity" as foundation of a world religion, and the use of the concept "antinomic" (antinomisch).

Lanczos thanks Pauli for his reply to his letter of 27 Nov, which clarifies the point in question.

The letter talks about the "sudden death of parity" in Wu's experiments, problems with nucleon-force data for deuterons and travel plans to Copenhagen, Zürich and Sydney.