Well, there&#x27;s some situations where it is so obvious to use debt that you don&#x27;t need a cost&#x2F;benefit analysis.<p>For example, let&#x27;s say you discover a large deposit of gold on land you own. You could use debt to buy the mining equipment to mine the gold.<p>Another example is if terrorists demolished all the bridges between Manhattan and Brooklyn. The government doesn&#x27;t need a cost&#x2F;benefit analysis to decide to use debt to rebuild some bridges.