premise: He tried to persuade a local banker to loan more money to the villagers, but the banker refused, insisting they didn't qualify for credit. So, Yunus started his own bank to help the poorest of the poor lift themselves up.
hypothesis: All of the poor are equally poor.
reason: Since according to the context "Yunus started his own bank to help the poorest of the poor lift themselves up" we know that some of the poor are poorer than others.  Therefore the statement is definitely incorrect.