But that doesn't mean that all, or many, or most of today's attested languages couldn't descend perhaps from one that's much younger than that, like say 20,000 years, or something of that kind. It's what we call a bottleneck.
Bet tas nenozīmē, ka visas, daudzas vai vismaz vairākums no mūsdienās zināmajām valodām nevarēja izcelties, piemēram, no vienas, kura ir daudz jaunāka, teiksim, 20 000 gadus, vai tamlīdzīgi. To mēs saucam par šauro vietu.