The field of paleoanthropology, I'll argue, gives us lots of fascinating possibilities about our ancestry, but it doesn't give us the probabilities that we really want as scientists.
我得说，古生人类学 向我们提供了很多非常有价值的可能性， 但是没有给我们提供每种可能性的概率，那才是科学家们真正需要的。