I came across this term ("level of speech") in the Getting Started Guide which I cannot find any further elaboration on in the document, or the forums, nor in the doc proper. The term does not appear in Dr. Holmstedt's PDF on the Acc syntax either.
N! Independent clause or sentence. (If there is a superscripted letter with the N, this
indicates a level of speech for the clause or sentence.)
Can someone explain to me what a "level of speech" for a clause or sentence is ? The only cases I have found so far are NA but are there other values ? If so how should one interpret them ?