I do see what you mean, but this sentence [”The reproduction of how Neanderthals worked shows that it is unlikely that stone flakes used in the tools could have been shaped by accident — and that our ancestors intentionally ‘engineered’ stone cores to create tools fit for their jobs.”] seemed pretty specific.
So I concede. As chopped up as the writing is I don't know how either one of us can say for sure what the writer meant.