ref.[@butt:gr-qc; @ish:gr-qc]. In quantum gravity dealing with the wavefunction of the universe, the traditional Copenhagen interpretation requires an ‘observer’ to carry out measurement; unfortunately we do not have this observer in quantum cosmology. A refinement replaces the ‘observer’ by a ‘classical background’ external to the system. This ‘precondition of unambiguous communication’, in Bohr’s words, is not a well-placed argument.

Let us turn to the Everettian idea. According to this idea the particular classical realm, we observe or we live in, is basically just ‘one component’ of the universal state vector which always evolves deterministically, never collapsing. The criticism against the “preferred basis”, chosen to serve as approximate position eigenstates of measurement, is now circumvented through the concept of decoherence. The decoherence allows a dynamically motivated specification of the ‘preferred basis’. However, there are some subtle aspects: avoidance of the traditional no-hidden-variable theorems i.e., algebraic theorems in the tradition of Von Neumann, and the non-locality theorems in the tradition of Bell that must be avoided in the Everettian ‘decoherence’ mechanism. The decoherence is basically a diffusion of coherence (characteristic of quantum superposition principle) from a system to its environment. In the dancing coherent-ground of the ‘system’ plus the ‘environment’, macro-objects’ initial 