  The microcanonical entropy $S=\ln[W(E)]$ is the {\em geometrical measure} of
the microscopic redundancy or ignorance about the N-body system. {\em Even for
astronomical large systems} is the microcanonical entropy everywhere {\em
single valued and multiply differentiable}. Also the microcanonical temperature
is at all energies single valued and differentiable. It is further shown that
the recently introduced singularities of the {\em microcanonical} entropy like
"microcanonical phase transitions", and exotic patterns of the {\em
microcanonical} caloric curve $T(E)$ like multi-valuednes or the appearance of
"dinosaur's necks" are inconsistent with Boltzmann's fundamental definition of
entropy.
