  In this paper, we discuss that an observable-based single-system Copenhagen
and entanglement-based two-system von Neumann measurement protocols in quantum
theory can be made equivalent by considering the second part of the two-system
scheme to be a Dirac-type negative sea filling up the first system. Based on
this equivalence, and by considering the universe as a computational process,
the choice of the apparatus state in the two-system protocol can be identified
with the choice of the observable in the single-system scheme as negative sea
filling up the observable universe. In particular, the measuring party's state
is considered to be evolving backwards in time to the big bang as a
nondeterministic computational process, which chooses the acceptable path as a
time-reversal process of irreversible computation. The suggested model proposes
that the prepared microstate of the universe, or reality, corresponds to the
observer's choice, therefore, subjective reality. Thus, this effectively
provides a specific description of the subjective universe model previously
proposed, which is based on the symmetry breakdown between the Schrodinger and
the Heisenberg pictures of quantum theory.
