Universal #707

Legacy number: 707

 Number  704
 Original  The number of height distinctions in front vowels is equal to or greater than the number in back vowels.
 Standardized  IF there are n height distinctions in back vowels, THEN there are not more than n distinctions in front vowels.
 Keywords  height, front, back, vowel
 Domain  phonology
 Type  implication
 Status  achronic
 Quality  absolute
 Basis  sample of 209 languages in Crothers 1978
 Source  Crothers 1978: 135, cited in Holenstein 1985: 125

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Discussion
Counterexamples
Northern and Southern Tepehuan, Papago (all Uto-Aztecan), Tlahuitoltepec Mixe (Mixe-Zoque), Guaymí (Chibchan) (Yasugi 1995: 74)