Abduction apparatus, abduction method, and computer-readable recording medium

An abduction method, comprising:

• calculating, with respect to each of candidate hypotheses generated using observation information and knowledge information, a posterior probability regarding the observation information;
• calculating, with respect to each of the candidate hypotheses, a deduction probability of deriving observation information as a consequence of applying the knowledge information;
• calculating, with respect to each of the candidate hypotheses, a consistency probability of not contradicting the knowledge information;
• and
• calculating an evaluation value using the posterior probability, the deduction probability, and the consistency probability, and determining a solution hypothesis that is an explanation regarding the observation information, from the candidate hypotheses, based on the calculated evaluation value.

A non-transitory computer-readable recording medium that includes a program recorded thereon, the program causing a computer to carry out:

• calculating, with respect to each of candidate hypotheses generated using observation information and knowledge information, a posterior probability regarding the observation information;
• calculating, with respect to each of the candidate hypotheses, a deduction probability of deriving observation information as a consequence of applying the knowledge information;
• calculating, with respect to each of the candidate hypotheses, a consistency probability of not contradicting the knowledge information;
• and
• calculating an evaluation value using the posterior probability, the deduction probability, and the consistency probability, and determining a solution hypothesis that is an explanation regarding the observation information, from the candidate hypotheses, based on the calculated evaluation value.