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At some point on the way from monkey to human, the addition of a new gene to the genome allowed a temporary activatable surface on the pharyngeal wall to form sounds. There is a place for each voiced sound, all together they form the pronunciation nest of a given language. Voiceless consonants make words easier to understand and increase their number. It was now possible to put an idea into the combination of sounds, which the whole human herd understood in the same way.
