It can tell us that his genome does not support the Paleoamerican hypothesis of a separate, earlier founding group.

What it cannot tell us is the specific, individual identity of the man buried in the cave.

His personal name — whatever language he spoke it in — is irrecoverable.

The community he belonged to, the language his community spoke, the specific social organization and ceremonial practices of the group he was part of — none of these are in the genome.

DNA can tell us about population-level genetic relationships.

It cannot tell us about the full complexity of cultural identity.