sentences:  (See Roeper for a full discussion of recursion in child language acquisition).In addition to word-order violations, other more ubiquitous results of a first-merge stage would show that children's initial utterances lack the recursive properties of inflectional morphology, yielding a strict Non-inflectional stage-1, consistent with an incremental Structure building model of child language.Merge takes two objects α and β and combines them, creating a binary structure.