  The overwhelming majority of scientists still takes it for granted that
classical mechanics (ClM) is nothing but a limiting case of quantum mechanics
(QM). Although some physicists restrict this belief to a generalized QM as
represented, e. g., by the algebra of observables, it will be shown in this
contribution that the view of ClM as a mere sub-set of QM is nevertheless
unfounded. The usual attempts to derive the laws of ClM from QM are either
insufficient or not universally applicable. The transition from traditional to
algebraic QM does not add any further insight. It is demonstrated that typical
constituents of the classical macroscopic world i) cannot be described
reasonably in terms of QM and/or ii) do not show up the typical quantum
behavior which manifests in the double-slit interference and in the
Einstein-Podolsky-Rosen correlations. Moreover, both attempts to recover ClM
from QM and approaches based on vacuum fluctuations are critically inspected,
and we arrive at the conclusion: QM does not comprehend ClM, i. e., a
wavefunction of the universe does not exist.
