Some Bounds to the Relevance of Decision Theory

Decision theory affords a means for the objectively rational use of information in decision-making. Concern has been expressed from time to time that the application of decision theory is, or is sometimes, of doubtful appropriateness. In this paper an attempt is made to identify a principal source of this concern and the mis-specification of decision problems using decision theory that it implies. Suggestions are offered as to how the merits of the use of decision theory might be retained in decision-making situations where doubts may arise about the appropriateness of its application.