It's NOT that you cannot know ANYTHING AT ALL about the situations of the unwitnessed / prehistoric past, ...
...You CAN go on multiplying error indefinitely because of the -- shall we say -- flexibility of interpretations, and the momentum gained by the particular interpretive scheme you've adopted that is shared by all your colleagues.
How can you tell when this is happening? How can you prevent it from happening?
Well, a creationist can tell it's happening with Old Earth and ToE interpretations, in fact it's so obvious it makes me groan all the time to read any of it.
Alright but how can you tell when it is happening? How would I go about determining if it was happening?