Interactive story system using four-valued logic

摘要

A language learning system that teaches an individualized set of vocabulary words to users through an interactive story. The interactive story is modeled through probabilistic rules in a semantic network having objects and relations. Dialog and narration is generated dynamically based on the state of the interactive story model using phrasal rewrite rules evaluated with a four-valued logic system in which truth values of the objects and relations are encoded as true, false, defined, and undefined in parallel memory structures.