The article proposes a formal semantics of happiness and sadness modalities in imperfect information setting. It shows that these modalities are not definable through each other and gives a sound and complete axiomatization of their properties.

中文翻译：

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如果你快乐，那你就会知道：幸福的逻辑……和悲伤

本文提出了不完善信息设置中幸福和悲伤模式的形式语义。它表明这些模态不能相互定义，并给出了其属性的合理完整的公理化。