Use when securing a binding commitment before a long campaign where rivals may slander you in your absence. Based on Gan Mao's (甘茂) method — citing the tale of Zeng Shen's mother (曾参之母) to illustrate how repeated false accusations erode even deep trust, then extracting a formal pledge.
Based on Gan Mao's method before attacking Yi Yang.
Before undertaking a difficult task where others may undermine you, secure a formal pledge by illustrating how easily trust can be broken.
Identify the Risk
Select Appropriate Analogy
Present Your Case
Secure Formal Commitment
Invoke Pledge When Needed