  Parker (1983) suggested a mechanism for the formation of current sheets (CSs)
in the solar atmosphere. His main idea was that the tangling of coronal
magnetic field lines by photospheric random flows facilitates the continuous
formation of CSs in the solar atmosphere. This part of his idea represents one
of the many ways by which the turbulent convection zone drives the formation of
coherent structures and CSs in the solar atmosphere. Other mechanisms include
emerging magnetic flux, interaction of current filaments, and explosive
magnetic structures. However, there are two unproven assumptions in the initial
idea of Parker for the coronal heating through nanoflares that must be
re-examined. They are related to his suggestion that {ALL CSs formed are led to
magnetic reconnection and that magnetic reconnection heats the plasma in the
solar atmosphere. Let us discuss these two assumptions briefly in this short
comment: (1) Are ALL coherent structures and CSs formed by the turbulent
convection zone reconnecting? Does turbulence associated with non-reconnecting
CSs play a role in the heating of the corona? (2) Does magnetic reconnection
heat the plasma?
