Can the students create a new product or point of view based on internal evidence or external criteria? (tes.com)
Biblical source criticism is almost wholly based on such internal evidence. (religion-online.org)
Russ Bauckham uses the Gospels themselves as internal evidence of their own eyewitness accounts but, if you're willing to accept the Gospels as trustworthy by their own declaration and you're easily impressed by the force of the author's argument alone then it might be compelling. (religion.blogs.cnn.com)