Comment by IAmBroom

I know someone who worked for the archaeologist who uncovered the then-oldest human tools in the Americas (the first pre-Clovis finds, IIRC).

He was ... unusual. My friend once spent an entire day hiding in their car at the worksite, because he was onsite that day, and they forgot to bring duct tape to cover their shoes. Shoes had to be fresh-wrapped in duct tape to prevent anything modern from dropping out of the treads onto the excavation floor.

You can ask lots of logical questions... "Why didn't they just...?" Answer: because the famous archaeologist was a nutbag, and controlled the worksite as his own personal absolute fiefdom. OTOH, if someone ever found a miniscule piece of glass at the 15,000YA level in that dig (as an example), his reputation would strengthen the dating.

That being said... his success was undeniable. Could he have done it, AND been less of a nutbag? Probably. But we don't live in Dr. Strange's multiverse.