Thirteen-Box Tagmemic Theory as a Method for Displaying Semi-Independent Language Variables September 12, 2013 By Vern Poythress Vern S. Poythress, "Thirteen-Box Tagmemic Theory as a Method for Displaying Semi-Independent Language Variables" (PDF), Originally published in Studies in Language 2/1:71-85. Used with permission. …Continue Reading about Thirteen-Box Tagmemic Theory as a Method for Displaying Semi-Independent Language Variables →