不能证明。反例如下：
努哈尔克语是一门“几乎没有元音”的语言，尽管其中有极少量的元音，但辅音不需要“附有元音”才能存在。努哈尔克语中，许多语句中仅存在一长串辅音，而没有元音和响音（其他音）穿插其中。以下大部分内容引自维基百科中对努哈尔克语的介绍。
Nuxalk（努哈尔克语） /ˈnuːhɒlk/, also known as Bella Coola/ˈbɛlə.ˈkuːlə/, is a Salishan language spoken by the Nuxalk people. Today it is "an endangered language with fewer than 10 fluent speakers" in the vicinity of the Canadian town of Bella Coola, British Columbia.
Nuxalk has 28 consonants depicted below in IPA and the Americanist orthography of Davis & Saunders when it differs from the IPA.
What are transcribed in the orthography as 'plain' velar consonants are actually palatals, and the sibilants s c c̓ palatalize to š č č̓ before k k̓ x.
The notion of syllable is challenged by Nuxalk in that it allows long strings of consonants without any intervening vowel or other sonorant.
Salishan languages, and especially Nuxalk, are famous for this. For instance, the following word contains only obstruents:
clhp'xwlhtlhplhhskwts'
[xɬpʼχʷɬtʰɬpʰɬːskʷʰt͡sʼ]
xłp̓χʷłtłpłłskʷc̓
'then he had had in his possession a bunchberry plant.'
(Nater 1984, cited in Bagemihl 1991: 16)
Other examples are:
[pʰs] 'shape, mold'
[pʼs] 'bend'
[pʼχʷɬtʰ] 'bunchberry'
[t͡sʰkʰtʰskʷʰt͡sʰ] 'he arrived'
[tʰt͡sʰ] 'little boy'
[skʷʰpʰ] 'saliva'
[spʰs] 'northeast wind'
[tɬʼpʰ] 'cut with scissors'
[st͡sʼqʰ] 'animal fat'
[st͡sʼqʰt͡sʰtʰx] 'that's my animal fat over there'
[sxs] 'seal fat'
[tʰɬ] 'strong'
[qʼtʰ] 'go to shore'
[qʷʰtʰ] 'crooked'
[kʼxɬːtʰsxʷ.sɬχʷtʰɬːt͡s] 'you had seen that I had gone through a passage' (Nater 1984, p. 5)
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