I think it is easy to be snide about fields like archaeology when you come from a field of absolutisms and proofs, but what else are they supposed to do with gaps in knowledge? We don't have to approach CS work wondering if the 1s and 0s we found were naturally occurring, or put there by some level of intelligent being. Our field in entirely of human construction.
The extension of this attitude leads to situations where Talib is berating a Classics professor for there being 'no data to back up her claim'! As if we can't study anything without data, or we should ignore history until there is something for a mathematician to work with on it.
Perhaps we should poke fun at the physicists who talk about 'dark matter' in the same way.
What a boring world it would be without shifting knowledge of the known and unknown.