"Dependence on input/base": In the domain of base-reduplicant identity, the phonological material of the reduplicant normally is just that of the base. This dependence on the base is violated in systems with fixed default segments in the reduplicant [...]. The parallel in the input-output domain is epenthesis, with default segments inserted under syllabic or other conditions.
- McCarthy & Prince (2004), Pag. 371-372