english: 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.
non_english: To ne znači da svi, ili mnogi, ili većina jezika za koje danas znamo nisu mogli nastati od nekog koji je mnogo mlađi od toga, npr. 20 hiljada godina, ili nešto slično. To je ono što zovemo "usko grlo".