EE user Bob raised the 64K question of the DNA era: How do we evaluate DNA using those two basic research tools—the Genealogical Proof Standard and the Evidence Analysis Map?
Sources give us information from which we select evidence. If our research is thorough and we have soundly analyzed our findings, we might reach a conclusion. The body of evidence on which we base that conclusion is our proof.
As students, we learned to classify sources into two types, as a basis for evaluating reliability. Primary sources, theoretically, would be original, contemporary records.