1. Why is certainty important?
2. What is an infallible sign?
3. What is the difference between objective and subjective certainty?
4. What is the circle that Popkin identifies in appealing to inner religious signs?
5. How can this be applied to contemporary Reformed Epistemology?
6. What is the distinction between epistemology and soteriology?
7. Do other forms of epistemological externalism face a similar circle to the one Popkin identifies?