Universal 1777:

Universal 1777:

Original

If there is assibilation of labials, then there must be assibilation of dentals.
If there is assibilation of dentals, then there must be assibilation of velars.

Standardized

IF there is assibilation of labials, THEN there must be assibilation of dentals.
IF there is assibilation of dentals, THEN there must be assibilation of velars.

Keywords

assibilation, labial, dental, velar

Domain

phonology

Type

implicational hierarchy

Status

unclear whether diachronic and/or achronic

Quality

absolute

Basis

Indo-European languages and Finnish

Source

Foley 1977: 94

Counterexamples