Yes, human DNA can be identified as human. There are specific genetic markers and sequences that are unique to humans.

However, there are caveats:

* No definitive "human only" sequence: While there are sequences commonly found in humans, there might be very rare exceptions or variations.

* Contamination: DNA analysis is highly sensitive. Even minute amounts of contamination from other sources could lead to false positives.

* Close relatives: DNA of closely related species like chimpanzees and bonobos share a lot of similarities with human DNA. Advanced analysis would be needed to definitively distinguish between them.

* Ancient DNA: DNA degrades over time. Analysing ancient DNA requires specialized techniques and can be more difficult to interpret.

So, while you can identify DNA as *likely* human based on its composition, it's not always possible to say with 100% certainty without additional information or specific genetic testing.

Here's how DNA analysis is typically used for identification:

* Forensics: DNA is used to identify individuals in criminal investigations. Here, a DNA profile is compared against a database of known individuals.

* Paternity testing: DNA can be used to determine biological relationships between individuals.

* Ancestry testing: By analyzing specific genetic markers, you can trace your ancestral lineage.

Ultimately, the certainty of DNA identification depends on the context and the specific method used.