Anchor: Four are essential to case study  iteration, OTTR, triangulation, and ruling out rival explanations.
Entailed: Four are needed for making sure the rival explanations are ruled out.
Contradiction: Four are needed for making sure the rival explanations are in fact correct.
Contradiction: Legal Services Corp is being eliminated.
Contradiction: He didn't buy it.
Contradiction: We must not engage the employees or their unions.
Contradiction: Did you mean that you put on a truck?