It can mean no one has done a study of a thing or existing studies are poor. I don’t know if that’s what the official means, but all kinds of common sense thin

It can mean no one has done a study of a thing or existing studies are poor. I don’t know if that’s what the official means, but all kinds of common sense things never end up being studied because they’re commonly believed to be true. Edit: having read the article more closely, however, it sounds like the official may be referring to things scientists believe they have debunked.