欺ㄑㄧqī以ㄧˇyǐ其ㄑㄧˊqí方ㄈㄤfāng

  1. 欺人必須合理。《孟子·萬章上》：「君子可欺以其方，難罔以非其道。」

英deceived by a pretense of reason (idiom)​