how the properties of vector mesons change when they are embedded in medium. An “ideal" snapshot for this is thought to be the dileptons mentioned above. In order to expose the effect of dense and/or hot medium, one tries to subtract all possible “trivial effects" that take place in zero-temperature, zero-density environment (e.g., “cocktail events"). Whether this can be done in a fully consistent way is not clear. The discussion given in the preceding subsection indicates that the distinction between what is trivial and what is non-trivial in the context of chiral symmetry can be highly problematic [*unless one can probe exclusively the vicinity of the VM fixed point.*]{} Let us suppose for the sake of discussion that $all$ such trivial effects can be taken out of the given experimental results and theorists are given what we shall call in-medium “ESF" (experimental spectral function). The question is: [*Can the ESF so obtained be used to verify or falsify Brown-Rho scaling or equivalently see evidence for partial or complete chiral symmetry restoration?*]{}

As stressed above, to properly address this question, it would be necessary to have at one’s disposal one complete self-consistent theoretical framework in which calculations can be done for 