Based on the observations we have seen earlier, one could argue that a BN forms a morphological unit with the following predicate or undergoes a lexical process.
this fails empirically in several respects: the BN's occurrence with a case or delimiter marker evidences both its syntactic and phonological independence from the following predicate: (9) a. sensayngnim-i o-si-l swu-(ka/cocha/man) eps-ta teacher-NOM come-HON-PNE BN-NOM/even/only not exist 'It is not possible that the teacher comes.'