President truman once said he wanted to find a one-armed economist because when he asked his economists for advice, they always answered, "on the one hand, ... on the other hand, ..." truman's observation that economists' advice is not always straightforward is rooted in the principle that people face tradeoffs. indicates that economists recognize that there are opportunity costs associated with policy decisions. confirms that economists are not suited to be presidential advisers. more than one of the above is correct.