Answer:
Both use hard evidence to sustain their work.
Step-by-step explanation:
Hard evidence is, in a nutshell, a physical item. This type of evidence is used to give to these professionals the first glimpse of society, and is trustable because can be seen and touched, but doesn't offer a full comprehension about the past. After a deep analysis of the artifacts, these professionals use another resource, such as literature, oral history, and iconography (images) to fulfill the lack of information.