This paper examines the nature of person complementarity in Eastern Canadian Inuktitut (Eskimo-Aleut), arguing that despite its apparent patterning as a Person Case Constraint (PCC) effect, it is not due to the presence of a defective intervener blocking person agreement with a lower argument, as is often the case in other languages. Instead, the observed effect is caused by a defective or missing person probe on C that cannot value local person features on absolutive arguments. Given the use of the PCC as a diagnostic for differentiating clitics and agreement, this result has implications for the proper identification of φ-marking in Inuktitut.