It has been suggested that the term 'heresy' be rehabilitated to descr
ibe challenges to ideology in a profession. However, the term has been
used in a variety of ways, impairing its descriptive utility. Using a
variety of examples of potential heretical ideas in modern science an
d medicine, this paper tries to carefully define heresy and distinguis
h it from other forms of ideological challenge to a profession, such a
s challenges to knowledge products and challenges to authority. A dram
aturgical approach is then used to try and describe the stages of here
tical conflict in a profession.