Text: But much remains to be done to create what Jefferson wrongly perceived as  an America with blacks and whites--and others as well--living in a state of equal freedom under the same government.
Entailment: Jefferson was in error when he regarded the US as a place many races lived in equality and there are still changes that need to take place to make that reality real.
Contradiction: Jefferson lived in a nation where everyone was equal in practice and under the law.