Analogy — Mutually exclusive properties: Error : Infallible :: ? : ? Pick the pair exhibiting the same “presence of flaw vs impossibility of flaw” contrast.

Introduction / Context:
“Infallible” means incapable of error. The parallel is “impeccable,” meaning without flaw. Thus, “Flaw : Impeccable” mirrors “Error : Infallible”.

Concept / Approach:
Preserve the contrast between a defect and a state that precludes any defect.

Why Other Options Are Wrong:

• Cure : Irreversible — Mixed concepts; not a preclusion relation.
• Emotion : Invulnerable — Category mismatch.
• Defect : Intolerable — “Intolerable” does not preclude defect; it describes acceptability.
• None of these — invalid since a correct pair exists.

Final Answer:
Flaw : Impeccable