  The inherent difficulty in talking about quantum decoherence in the context
of quantum cosmology is that decoherence requires subsystems, and cosmology is
the study of the whole Universe. Consistent histories gave a possible answer to
this conundrum, by phrasing decoherence as loss of interference between
alternative histories of closed systems. When one can apply Boolean logic to a
set of histories, it is deemed 'consistent'. However, the vast majority of the
sets of histories that are merely consistent are blatantly nonclassical in
other respects, and further constraints than just consistency need to be
invoked. In this paper, I attempt to give an alternative answer to the issues
faced by consistent histories, by exploring a timeless interpretation of
quantum mechanics of closed systems. This is done solely in terms of path
integrals in non-relativistic, timeless, configuration space. What prompts a
fresh look at such foundational problems in this context is the advent of
multiple gravitational models in which Lorentz symmetry is not fundamental, but
only emergent. And what allows this approach to overcome previous barriers to a
timeless, conditional probabilities interpretation of quantum mechanics is the
new notion of records -- made possible by an inherent asymmetry of
configuration space. I outline and explore consequences of this approach for
foundational issues of quantum mechanics, such as the natural emergence of the
Born rule, conservation of probabilities, and the Sleeping Beauty paradox.
