We describe how the choice of an appropriate (“physical”) gauge leads to the solution of a nonperturbative problem in quantum electrodynamics: dynamical chiral symmetry breaking in QED in a constant magnetic field.

Questions revolving around the possibility and justifiability of reductive analyses of the concept 'not', lie at the heart of many of the problems in the philosophical interpretation of not-descriptions. In this thesis, I wish to show, by discussing various problems in the logic of not-descriptions, that, and why, reductive analyses must be unsatisfactory. Chapter 1, p. 1.