Chiropractic in Plano Education and Research (FCER) considered subluxation and the concept of Occam’s razor. He suggests “there is no obvious reason to discard the concept of subluxation, while at the same time maintaining that it is not a rigid entity, but rather an important model and concept; a work in progress that undoubtedly will undergo extensive modification as our concepts of light or psychoanalysis have evolved over half a century.