Passage Summary: An advice columnist says parents shouldn't teach kids to focus on beating others because it makes them bitter and unhappy.

Conclusion: Parents should avoid encouraging their children to value outdoing others.

Reasoning: Valuing competition leads to resentment and creates a persistent, difficult-to-satisfy desire for achievement that reduces overall happiness.

Analysis: To justify this advice, we need a principle that connects the negative outcomes mentioned (resentment and unhappiness) to the recommendation (don't encourage the behavior). The argument assumes that if a motivation leads to unhappiness or social friction, it is a motivation that should not be fostered. Look for a principle that bridges this gap, likely stating that parents should not encourage traits that are detrimental to a child's long-term well-being.