This discrepancy in timescales undermines the idea that human vocal flexibility was initially driven by selection pressures for speech, thus not excluding that it was selected for e.g. improved singing ability.
Ova neusaglašenost oko vremena nastanka podriva ideju da je fleksibilnost ljudskog glasa inicijalno pokrenuta zahtevima selekcije za govorom i prema tome nije isključeno da je govor bio izabran zbog npr. sposobnosti pevanja.