Why is it important to know about precedent cases before before you decide on the DLK case

the united states has a federal government. the president is the head of the federal government of the united states. however, each state forms its government for administration purposes. the powers of the state governments are exercised within restricted state boundaries. and citizens participate in this government by voting.

could you show the options for the answers? : )

answer; interpreting someone's past consistent with present deviance;

answerintellectual capital;