Of course I can. [ smoothly ] In the common definition of the word, the elite of a species are always the only members of it evolving. Even when we're being more technical, different members of a species may evolve in different ways. What it means in an insect hive for a drone to evolve is quite different from what it means for the queen; their different stations in life and different specializations make different behaviors adaptive.
I'll concede the point on languages, though I would observe that just because the single common language of your world might not end up being English does not necessarily mean your world will forever be without one. Progress is not a straight line; knowledge is gained and lost as empires rise and fall. But globalization is something of a vaccine on that score -- when everyone is connected, losing knowledge becomes more difficult. And it globalization, once it exists on a large enough scale, is generally undone only by true catastrophe.
[ here he pauses, before finally saying ] I agree that humanity does not always keep up with science. But if your dispute is still with "Acumen" itself, then rest assured that neither keyboard nor scanner have any artificial intelligence of which to speak.