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How does Saul come to be anointed by Samuel?
Saul’s father, Kish, is a Benjamite.
Kish loses some donkeys, sends Saul out to find a “seer” to find them, Saul finds Samuel, signs come true, Saul is reluctant, Saul returns with the donkeys.
In the second narrative, Saul is chosen by lots.
The D authors were not interested in eliminating all contradictions– they had too much respect for the original authors.