“The possibility that the Pentagon UFOs are human-made can potentially be excluded by identifying behavior that cannot be reproduced by our most advanced equipment. We know our technological limits because any advance that goes well beyond them would have introduced major commercial or military benefits and would have been represented in the consumer market or on the battlefield.”
I don’t think that speculation is really logically sound.
Avi Loeb, the former chair of the Harvard Astronomy Dept, said today IIRC that it can be concluded that this tech is not ours or Chinese/Russian because it has been observed for a very long time (70 years is the number being tossed around).
It is likely that such a technological development would have had some by-products which would be in evidence in the world today...but that is not the case.
Perhaps I need a late afternoon cup of coffee.
Here's what Avi Loeb said in the article above re: your question:
The possibility that the Pentagon UFOs are humanmade can potentially be excluded by identifying behavior that cannot be reproduced by our most advanced equipment. We know our technological limits because any advance that goes well beyond them would have introduced major commercial or military benefits and would have been represented in the consumer market or on the battlefield.