Passage Summary: The author argues that trying to prove or disprove the law of noncontradiction is pointless because any starting assumptions you'd use for the argument are less reliable than the law you're trying to discuss.

Conclusion: Engaging in a debate regarding the validity of the law of noncontradiction is a futile exercise.

Reasoning: Productive debates require participants to share basic principles, yet any principles used to debate this specific law would be less certain than the law itself, rendering the defense insignificant.

Analysis: This is an 'Identify the Conclusion' question, so we must isolate the author's primary claim without judging its logic. The first sentence serves as the main conclusion, while the rest of the passage provides the 'why.' I identified this by noticing that the second sentence begins with 'For,' which introduces a premise supporting the preceding statement. The final sentence further supports the opening claim by explaining why using other principles to defend the law is 'of little matter.'