Anthropology

that the first question was not asked by a homo sapiens. The people in the caves were a continuation of the question and answering from the thousands of generations that developed from that learning.
Visualize a crow teaching its offspring to use bait to lure prey saying in their inimitable way, did you see how it works?
These cave discussions were passed around as shared knowledge looking for better answers to the questions of the day.
The language was limited, but the brain function used what it knew and created, through discussion, a means to teach better than just the show.