What do the scientists testing a document do in the internal test, the external test, and the bibliographic test?
In the internal test the scientists are trying to see if the document contradicts itself. In the external test, they are trying to see if it contradicts any other historical facts that have past all three tests already. In the bibliographic test the document is considered reliable if it contains direct eyewitness or second-hand report that is based on eyewitness accounts.