Solving a problem is hard enough; it gets that much harder if youโve decided beforehand it canโt be done.
Steven LevittAfter all, your chances of winning a lottery and of affecting an election are pretty similar. From a financial perspective, playing the lottery is a bad investment. But it's fun and relatively cheap: for the price of a ticket, you buy the right to fantasize how you'd spend the winnings - much as you get to fantasize that your vote will have some impact on policy.
Steven LevittThe key to learning is feedback. It is nearly impossible to learn anything without it.
Steven Levitt