10. Where are the required causes found?
11, 12. Not in the direct results of human will.
13–15. Examination of apparent exceptions.
16–18. Further analysis of some natural causes.
[CHAPTER IV.]
HOW TO DISCOVER AND PROVE THE SERIES.
§ 1. The data of Probability are established by experience;
2. Though in practice most problems are solved deductively.
3–7. Mechanical instance to show the inadequacy of any à priori proof.
8. The Principle of Sufficient Reason inapplicable.