Final answer:
Kouzes and Posner's study indeed found honesty to be a crucial trait for a leader's credibility, as it is foundational for establishing trust and integrity.
Step-by-step explanation:
True, Kouzes and Posner's study highlighted honesty as a particularly important trait for a leader to possess in order to be deemed credible. Credibility is the foundation of leadership; if people are to follow someone willingly, they must believe in the leader's integrity and trust that their words match their actions. This concept is essential for leaders in various fields, whether in business, politics, or community action, as it fosters trust and legitimacy among followers and stakeholders.