The point is that these are not just brain teasers, these are just distilled examples of problems with which the brain often chooses a short-cut algorithm. The

The point is that these are not just brain teasers, these are just distilled examples of problems with which the brain often chooses a short-cut algorithm. The implication is that analogues of these situations happen all the time, and your ability to apply rational thought is proportional to the likelihood of achieving desirable outcomes.