From the perspective of semantics and its definition of "logic truth", its subject promise is the possible world.

从语义学角度和它对“逻辑真”的定义看，它的本体论承诺是可能世界。

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To establish a model is the precondition to the logical and semantic analysis of epistemic expressions and the theory of possible world semantics provides an effective tool for this.

建立模型是对认知表达式进行逻辑语义分析的前提，可能世界语义学为此提供了有效工具。

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Modal logic is quite mature at its formal technique, but its possible world semantics has many difficult in philosophical interpretations.

建立模型是对认知表达式进行逻辑语义分析的前提，可能世界语义学为此提供了有效工具。

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