Traditionally? Humanities. Those fields have the advantage of starting with common experience and a natural-language corpus, so there isn't as high a barrier to

Traditionally? Humanities. Those fields have the advantage of starting with common experience and a natural-language corpus, so there isn't as high a barrier to entry as STEM disciplines. But, you know... we don't do that anymore. (And yes, I know, some of the reasons are intrinsic to choices made by people within the Humanities.) We've abandoned that, but not found a better way.