We show that current experimental knowledge of QCD together with general
model independent arguments such as continuity, universality and thermodynamic
relations, as well as the information gained from various models can be used to
constrain the phase diagram of QCD as a function of temperature and baryon
chemical potential.Comment: 6 pages; to appear in Proceedings of the Intl Workshop on QCD at
Finite Baryon Density, Bielefeld, Germany, April 199