2. Why did Crusoe work at all?
3. When he began to work at one thing, why did he ever stop to work at another?
4. What is the difference in utility between the water in a solid mountain reservoir and the same water when it is flooding the valley?
5. Does it change the utility of a load of powder to touch a match to it?
6. Is water useful? Is dynamite?
7. Is the last bait worth more when the fish are biting well?
8. Are the following wealth: food, tobacco, medicine, whisky, good looks, good health, a wooden leg?
9. Is a book full of useful information, wealth? Is a head full of useful knowledge, wealth?
10. Is a ship at the bottom of the ocean, or gold in the mine, wealth?
11. Is well-being in proportion to wealth? Why?