Anchor: Beyond 3a, less attractive customers and relatively more difficult mail would begin to convert to presort.
Entailed: The mail begins to presort after 3a happens.
Contradiction: There is no tough mail among the sorted mail.
Contradiction: The two men are sitting on the curb.
Contradiction: Three guys are wearing green.
Contradiction: Data-processing not explicitly described?
Contradiction: All of the different things, you know.