Text: If reducing federal debt held by the public is not an option, as discussed in text box 4.2, investing in nonfederal financial assets on behalf of the Social Security trust fund could be another way for government saving to provide resources for private investment.
Entailment: Investing financial assets that don't belong to the federal government for the Social Security trust fund is one way for the government to provide resources while saving government money.
Contradiction: Reducing any federal debt that's publicly held is the only option available to the government.