27. The non-transitory computer-readable recording medium according to claim 26 , wherein the (b) step comprises deriving, based on the result of the determination in the (a) step, an extent to which the content of the homogeneous segment is included in the second text corresponding to the other first text which includes the homogeneous segment, further deriving, based on the derived extent, a degree to which each segment constituting the first text which is set as the analysis target should be described in the second text corresponding to the first text which is set as the analysis target, and performing the determination using the degree.
27. The non-transitory computer-readable recording medium according to claim 26 , wherein the (b) step comprises deriving, based on the result of the determination in the (a) step, an extent to which the content of the homogeneous segment is included in the second text corresponding to the other first text which includes the homogeneous segment, further deriving, based on the derived extent, a degree to which each segment constituting the first text which is set as the analysis target should be described in the second text corresponding to the first text which is set as the analysis target, and performing the determination using the degree. 28. The non-transitory computer-readable recording medium according to claim 27 , wherein the (m) step, in addition to the determination regarding the content of the homogeneous segment, comprises computing, for each of the plurality of segments constituting the first text which is set as the analysis target and for the homogeneous segment, an inclusion score representing a possibility of a content of the segment being included in the second text corresponding to the first text which includes the segment, and the (b) step comprises further deriving the degree using the inclusion score computed in the (m) step, such that the degree increase the higher the inclusion score.