[Pharyngeal Expansion], the feature Pater gives voiced obstruents and implosives and denies nasals and voiceless obstruents: here the [−sonorant, +voice] segments.
- PharExp s = (s.HasValue Phonology.Feature.sonorant false ∧ s.HasValue Phonology.Feature.voice true)
Used by instDecidablePredSegmentPharExp