If archeological evidence is the litmus for
recorded history, then in 200 or so years,
one may actually be able to deny the holocaust
or any other inconvenient truth.
How would you use archaeological evidence to deny the Holocaust?
I wouldn't go that far. There have always been Holocaust deniers and there have always been bad scientists who make theories and then proceed to make up facts to fit them.
Not all scientists are like that. If you are prepared to spend years in college to devote your life to a given discipline, it's likely because you have an intense interest in that disciline. Biblical archeology for example uses tried and true archeological techniques to find the remains of temples and other biblically significant sites 2000 years old and more. However people have always denied the existance or Christ.
In 200 years there will still be Holocaust deniers and the archeological evidence will still exist which proved it did happen that the moonbats are still loony.