interactive system, redundant messages exclusion method and redundant message exclusion program

摘要

For each question sentence included in the set of question sentences that are candidate response messages to the user utterance that is character string information indicating the user's utterance contents and is in the form of question string, Based on the answer content rate for the user utterance of each question text obtained by the answer property evaluation means 501 for obtaining the answer content rate indicating the degree of including an expression that is an answer to the question text, Question sentence ranking means 502 is provided for ranking each question sentence in ascending order of answer content rate.