From the introduction: "The dual structural criterion (referred to henceforth as DSC) is a solidly established piece of discovery procedure in tagmemic methodology. Its basic usefulness and empirical adequacy is reflected in a great number of tagmemic descriptions, whether the authors explicitly refer to it or not.
"There are, however, two major limitations to the usefulness of the dual structural criterion: the first pertains to its application as a practical tool of analysis, the second, to its theoretical status. I shall try to show that the two weaknesses are interrelated."
"The dual structural criterion reviewed,"
Work Papers of the Summer Institute of Linguistics, University of North Dakota Session: Vol. 18, Article 1.
Available at: https://commons.und.edu/sil-work-papers/vol18/iss1/1