Why did farmers rely on whiskey as a main product to sell

Farmers relied on whiskey as the main product to sell because generated a greater income for the farmers. They earned more per liter than they did when they sold the grain to buyers.  In other words, it was more profit-intensive. Grain was also difficult to transport to the market while whiskey  was easier to transport to the market.  The farmers who distilled the whisky used to barter with the whisky - it acted as a currency. Farmers traded whiskey for the goods they needed. 

their claim about cheating existing in high-incentive situations

the facts they present about sumo and the bagel business

their use of statistical evidence

their use of different examples (sumo and bagels) in their evidence

their overall use of inductive reasoning to arrive at a generalization about morality