Provided is an information processing device to preferentially present information which each user does not have detailed knowledge, among inference results inferred from context. The information processing device includes: an inference unit that obtains inference results by applying inference rules to context information; an inference result index value calculation unit that calculates, on the basis of a knowledge level of a reading user about each inference rule used in an inference process, index values that show depth of knowledge of the reading user about the inference results comprehensively; an inference result presentation unit that presents the inference results on the basis of the index values; and an knowledge level update unit that updates the knowledge level of the reading user about each inference rule used in the inference process on the basis of evaluation information acquired.