Abstract
In recent years, the family therapy field has witnessed a renewed interest in systems theory, coupled with a concern with epistemology. This paper examines the theoretical dilemmas which arise from the polarization of family epistemologies into the pragmatic and the aesthetic. It then examines the problem of ascertaining the truth of any theory, from three different perspectives: truth as fact; truth as coherence; truth as usefulness. It concludes with the presentation of four advantages of applying systems theory to the theory and practice of family therapy.