Are all normal maps antinormal?
Determine whether there exists a pointed category in which some normal map does not admit an antinormal decomposition; if so, develop sufficient conditions characterizing pointed categories in which every normal map admits an antinormal decomposition.
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References
We also turned certain questions which we currently are unable to answer into exercises; these are labelled 'ANK' for 'answer not known'. Determine if there is a pointed category in which there exists a normal map which does not admit an antinormal decomposition. If such a category exists, develop sufficient conditions to identify pointed categories in which every normal map admits an antinormal decomposition.
— A Homological View of Categorical Algebra
(2404.15896 - Peschke et al., 24 Apr 2024) in Exercise 2.1.29 (Are normal maps antinormal?) - Section 2.1