question: What argument does Sowell make in his claim that non - preferred minorities have less incentive to perform at their best ?
answer: because it can prove futile
turker_answer: Sowell claims that because it can prove futile , non - preferred minorities have less incentive to perform at their best .
rule-based: Sowell makes because it can prove futile in his claim that non - preferred minorities have less incentive to perform at their best .